21312940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8807}}^1$

素因数の和:8838

約数の個数: 36

約数和(自身を含む): 49201488

約数和(自身を除く): 27888548

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8807, 17614, 35228, 44035, 88070, 96877, 176140, 193754, 387508, 484385, 968770, 1065647, 1937540, 2131294, 4262588, 5328235, 10656470, 21312940]

約数ペア:

[(1, 21312940), (2, 10656470), (4, 5328235), (5, 4262588), (10, 2131294), (11, 1937540), (20, 1065647), (22, 968770), (44, 484385), (55, 387508), (110, 193754), (121, 176140), (220, 96877), (242, 88070), (484, 44035), (605, 35228), (1210, 17614), (2420, 8807)]