18978970

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{111641}}^1$

素因数の和:111665

約数の個数: 16

約数和(自身を含む): 36172008

約数和(自身を除く): 17193038

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 111641, 223282, 558205, 1116410, 1897897, 3795794, 9489485, 18978970]

約数ペア:

[(1, 18978970), (2, 9489485), (5, 3795794), (10, 1897897), (17, 1116410), (34, 558205), (85, 223282), (170, 111641)]