21261344

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{51109}}^1$

素因数の和:51132

約数の個数: 24

約数和(自身を含む): 45079020

約数和(自身を除く): 23817676

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 208, 416, 51109, 102218, 204436, 408872, 664417, 817744, 1328834, 1635488, 2657668, 5315336, 10630672, 21261344]

約数ペア:

[(1, 21261344), (2, 10630672), (4, 5315336), (8, 2657668), (13, 1635488), (16, 1328834), (26, 817744), (32, 664417), (52, 408872), (104, 204436), (208, 102218), (416, 51109)]