21331640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48481}}^1$

素因数の和:48503

約数の個数: 32

約数和(自身を含む): 52360560

約数和(自身を除く): 31028920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48481, 96962, 193924, 242405, 387848, 484810, 533291, 969620, 1066582, 1939240, 2133164, 2666455, 4266328, 5332910, 10665820, 21331640]

約数ペア:

[(1, 21331640), (2, 10665820), (4, 5332910), (5, 4266328), (8, 2666455), (10, 2133164), (11, 1939240), (20, 1066582), (22, 969620), (40, 533291), (44, 484810), (55, 387848), (88, 242405), (110, 193924), (220, 96962), (440, 48481)]