20520999

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:316

約数の個数: 32

約数和(自身を含む): 31549440

約数和(自身を除く): 11028441

約数列:

[1, 3, 9, 27, 47, 103, 141, 157, 309, 423, 471, 927, 1269, 1413, 2781, 4239, 4841, 7379, 14523, 16171, 22137, 43569, 48513, 66411, 130707, 145539, 199233, 436617, 760037, 2280111, 6840333, 20520999]

約数ペア:

[(1, 20520999), (3, 6840333), (9, 2280111), (27, 760037), (47, 436617), (103, 199233), (141, 145539), (157, 130707), (309, 66411), (423, 48513), (471, 43569), (927, 22137), (1269, 16171), (1413, 14523), (2781, 7379), (4239, 4841)]