21701875

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{2671}}^1$

素因数の和:2704

約数の個数: 20

約数和(自身を含む): 29215648

約数和(自身を除く): 7513773

約数列:

[1, 5, 13, 25, 65, 125, 325, 625, 1625, 2671, 8125, 13355, 34723, 66775, 173615, 333875, 868075, 1669375, 4340375, 21701875]

約数ペア:

[(1, 21701875), (5, 4340375), (13, 1669375), (25, 868075), (65, 333875), (125, 173615), (325, 66775), (625, 34723), (1625, 13355), (2671, 8125)]