19972655

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1\times {\mathrm{443}}^1$

素因数の和:646

約数の個数: 16

約数和(自身を含む): 24551424

約数和(自身を除く): 4578769

約数列:

[1, 5, 71, 127, 355, 443, 635, 2215, 9017, 31453, 45085, 56261, 157265, 281305, 3994531, 19972655]

約数ペア:

[(1, 19972655), (5, 3994531), (71, 281305), (127, 157265), (355, 56261), (443, 45085), (635, 31453), (2215, 9017)]