21028285

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{1531}}^1$

素因数の和:1644

約数の個数: 16

約数和(自身を含む): 26252352

約数和(自身を除く): 5224067

約数列:

[1, 5, 41, 67, 205, 335, 1531, 2747, 7655, 13735, 62771, 102577, 313855, 512885, 4205657, 21028285]

約数ペア:

[(1, 21028285), (5, 4205657), (41, 512885), (67, 313855), (205, 102577), (335, 62771), (1531, 13735), (2747, 7655)]