17因数有1和17。17是质数，质数的因数只有1和它本身。两个正整数相乘，那么这两个数都叫做积的因数，或称为约数。质数是指在大于1的自然数中，除了1和它本身以外不再有其他因数的自然数。任一大于1的自然[详细]
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