16991875

素因数分解:

$5^4\times {\mathrm{31}}^1\times {\mathrm{877}}^1$

素因数の和:928

約数の個数: 20

約数和(自身を含む): 21942976

約数和(自身を除く): 4951101

約数列:

[1, 5, 25, 31, 125, 155, 625, 775, 877, 3875, 4385, 19375, 21925, 27187, 109625, 135935, 548125, 679675, 3398375, 16991875]

約数ペア:

[(1, 16991875), (5, 3398375), (25, 679675), (31, 548125), (125, 135935), (155, 109625), (625, 27187), (775, 21925), (877, 19375), (3875, 4385)]