19990629

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{523}}^1$

素因数の和:697

約数の個数: 24

約数和(自身を含む): 30081792

約数和(自身を除く): 10091163

約数列:

[1, 3, 9, 31, 93, 137, 279, 411, 523, 1233, 1569, 4247, 4707, 12741, 16213, 38223, 48639, 71651, 145917, 214953, 644859, 2221181, 6663543, 19990629]

約数ペア:

[(1, 19990629), (3, 6663543), (9, 2221181), (31, 644859), (93, 214953), (137, 145917), (279, 71651), (411, 48639), (523, 38223), (1233, 16213), (1569, 12741), (4247, 4707)]