21545020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{6691}}^1$

素因数の和:6730

約数の個数: 48

約数和(自身を含む): 53964288

約数和(自身を除く): 32419268

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 6691, 13382, 26764, 33455, 46837, 66910, 93674, 133820, 153893, 187348, 234185, 307786, 468370, 615572, 769465, 936740, 1077251, 1538930, 2154502, 3077860, 4309004, 5386255, 10772510, 21545020]

約数ペア:

[(1, 21545020), (2, 10772510), (4, 5386255), (5, 4309004), (7, 3077860), (10, 2154502), (14, 1538930), (20, 1077251), (23, 936740), (28, 769465), (35, 615572), (46, 468370), (70, 307786), (92, 234185), (115, 187348), (140, 153893), (161, 133820), (230, 93674), (322, 66910), (460, 46837), (644, 33455), (805, 26764), (1610, 13382), (3220, 6691)]