18980785

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1\times {\mathrm{421}}^1$

素因数の和:624

約数の個数: 16

約数和(自身を含む): 23334912

約数和(自身を除く): 4354127

約数列:

[1, 5, 71, 127, 355, 421, 635, 2105, 9017, 29891, 45085, 53467, 149455, 267335, 3796157, 18980785]

約数ペア:

[(1, 18980785), (5, 3796157), (71, 267335), (127, 149455), (355, 53467), (421, 45085), (635, 29891), (2105, 9017)]