21279700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{16369}}^1$

素因数の和:16396

約数の個数: 36

約数和(自身を含む): 49732060

約数和(自身を除く): 28452360

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 16369, 32738, 65476, 81845, 163690, 212797, 327380, 409225, 425594, 818450, 851188, 1063985, 1636900, 2127970, 4255940, 5319925, 10639850, 21279700]

約数ペア:

[(1, 21279700), (2, 10639850), (4, 5319925), (5, 4255940), (10, 2127970), (13, 1636900), (20, 1063985), (25, 851188), (26, 818450), (50, 425594), (52, 409225), (65, 327380), (100, 212797), (130, 163690), (260, 81845), (325, 65476), (650, 32738), (1300, 16369)]