21705831

素因数分解:

$3^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{3049}}^1$

素因数の和:3175

約数の個数: 24

約数和(自身を含む): 36160800

約数和(自身を除く): 14454969

約数列:

[1, 3, 7, 9, 21, 63, 113, 339, 791, 1017, 2373, 3049, 7119, 9147, 21343, 27441, 64029, 192087, 344537, 1033611, 2411759, 3100833, 7235277, 21705831]

約数ペア:

[(1, 21705831), (3, 7235277), (7, 3100833), (9, 2411759), (21, 1033611), (63, 344537), (113, 192087), (339, 64029), (791, 27441), (1017, 21343), (2373, 9147), (3049, 7119)]