20865125

素因数分解:

$5^3\times {\mathrm{71}}^1\times {\mathrm{2351}}^1$

素因数の和:2437

約数の個数: 16

約数和(自身を含む): 26417664

約数和(自身を除く): 5552539

約数列:

[1, 5, 25, 71, 125, 355, 1775, 2351, 8875, 11755, 58775, 166921, 293875, 834605, 4173025, 20865125]

約数ペア:

[(1, 20865125), (5, 4173025), (25, 834605), (71, 293875), (125, 166921), (355, 58775), (1775, 11755), (2351, 8875)]