20642751

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{569}}^1$

素因数の和:743

約数の個数: 24

約数和(自身を含む): 31122000

約数和(自身を除く): 10479249

約数列:

[1, 3, 9, 29, 87, 139, 261, 417, 569, 1251, 1707, 4031, 5121, 12093, 16501, 36279, 49503, 79091, 148509, 237273, 711819, 2293639, 6880917, 20642751]

約数ペア:

[(1, 20642751), (3, 6880917), (9, 2293639), (29, 711819), (87, 237273), (139, 148509), (261, 79091), (417, 49503), (569, 36279), (1251, 16501), (1707, 12093), (4031, 5121)]