21565744

素因数分解:

$2^4\times {\mathrm{131}}^1\times {\mathrm{10289}}^1$

素因数の和:10428

約数の個数: 20

約数和(自身を含む): 42106680

約数和(自身を除く): 20540936

約数列:

[1, 2, 4, 8, 16, 131, 262, 524, 1048, 2096, 10289, 20578, 41156, 82312, 164624, 1347859, 2695718, 5391436, 10782872, 21565744]

約数ペア:

[(1, 21565744), (2, 10782872), (4, 5391436), (8, 2695718), (16, 1347859), (131, 164624), (262, 82312), (524, 41156), (1048, 20578), (2096, 10289)]