21275515

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{1549}}^1$

素因数の和:1662

約数の個数: 16

約数和(自身を含む): 26560800

約数和(自身を除く): 5285285

約数列:

[1, 5, 41, 67, 205, 335, 1549, 2747, 7745, 13735, 63509, 103783, 317545, 518915, 4255103, 21275515]

約数ペア:

[(1, 21275515), (5, 4255103), (41, 518915), (67, 317545), (205, 103783), (335, 63509), (1549, 13735), (2747, 7745)]