21104980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81173}}^1$

素因数の和:81195

約数の個数: 24

約数和(自身を含む): 47730312

約数和(自身を除く): 26625332

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81173, 162346, 324692, 405865, 811730, 1055249, 1623460, 2110498, 4220996, 5276245, 10552490, 21104980]

約数ペア:

[(1, 21104980), (2, 10552490), (4, 5276245), (5, 4220996), (10, 2110498), (13, 1623460), (20, 1055249), (26, 811730), (52, 405865), (65, 324692), (130, 162346), (260, 81173)]