21212812

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{113}}^1\times {\mathrm{661}}^1$

素因数の和:849

約数の個数: 24

約数和(自身を含む): 38035872

約数和(自身を除く): 16823060

約数列:

[1, 2, 4, 71, 113, 142, 226, 284, 452, 661, 1322, 2644, 8023, 16046, 32092, 46931, 74693, 93862, 149386, 187724, 298772, 5303203, 10606406, 21212812]

約数ペア:

[(1, 21212812), (2, 10606406), (4, 5303203), (71, 298772), (113, 187724), (142, 149386), (226, 93862), (284, 74693), (452, 46931), (661, 32092), (1322, 16046), (2644, 8023)]