21069925

素因数分解:

$5^2\times {\mathrm{31}}^2\times {\mathrm{877}}^1$

素因数の和:949

約数の個数: 18

約数和(自身を含む): 27027474

約数和(自身を除く): 5957549

約数列:

[1, 5, 25, 31, 155, 775, 877, 961, 4385, 4805, 21925, 24025, 27187, 135935, 679675, 842797, 4213985, 21069925]

約数ペア:

[(1, 21069925), (5, 4213985), (25, 842797), (31, 679675), (155, 135935), (775, 27187), (877, 24025), (961, 21925), (4385, 4805)]