20915336

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{2423}}^1$

素因数の和:2525

約数の個数: 32

約数和(自身を含む): 42759360

約数和(自身を除く): 21844024

約数列:

[1, 2, 4, 8, 13, 26, 52, 83, 104, 166, 332, 664, 1079, 2158, 2423, 4316, 4846, 8632, 9692, 19384, 31499, 62998, 125996, 201109, 251992, 402218, 804436, 1608872, 2614417, 5228834, 10457668, 20915336]

約数ペア:

[(1, 20915336), (2, 10457668), (4, 5228834), (8, 2614417), (13, 1608872), (26, 804436), (52, 402218), (83, 251992), (104, 201109), (166, 125996), (332, 62998), (664, 31499), (1079, 19384), (2158, 9692), (2423, 8632), (4316, 4846)]