21312280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48437}}^1$

素因数の和:48459

約数の個数: 32

約数和(自身を含む): 52313040

約数和(自身を除く): 31000760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48437, 96874, 193748, 242185, 387496, 484370, 532807, 968740, 1065614, 1937480, 2131228, 2664035, 4262456, 5328070, 10656140, 21312280]

約数ペア:

[(1, 21312280), (2, 10656140), (4, 5328070), (5, 4262456), (8, 2664035), (10, 2131228), (11, 1937480), (20, 1065614), (22, 968740), (40, 532807), (44, 484370), (55, 387496), (88, 242185), (110, 193748), (220, 96874), (440, 48437)]