21637220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8941}}^1$

素因数の和:8972

約数の個数: 36

約数和(自身を含む): 49950012

約数和(自身を除く): 28312792

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8941, 17882, 35764, 44705, 89410, 98351, 178820, 196702, 393404, 491755, 983510, 1081861, 1967020, 2163722, 4327444, 5409305, 10818610, 21637220]

約数ペア:

[(1, 21637220), (2, 10818610), (4, 5409305), (5, 4327444), (10, 2163722), (11, 1967020), (20, 1081861), (22, 983510), (44, 491755), (55, 393404), (110, 196702), (121, 178820), (220, 98351), (242, 89410), (484, 44705), (605, 35764), (1210, 17882), (2420, 8941)]