81757475

素因数分解:

$5^2\times {\mathrm{19}}^2\times {\mathrm{9059}}^1$

素因数の和:9107

約数の個数: 18

約数和(自身を含む): 107007660

約数和(自身を除く): 25250185

約数列:

[1, 5, 19, 25, 95, 361, 475, 1805, 9025, 9059, 45295, 172121, 226475, 860605, 3270299, 4303025, 16351495, 81757475]

約数ペア:

[(1, 81757475), (5, 16351495), (19, 4303025), (25, 3270299), (95, 860605), (361, 226475), (475, 172121), (1805, 45295), (9025, 9059)]