215249780

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{13109}}^1$

素因数の和:13939

約数の個数: 24

約数和(自身を含む): 452609640

約数和(自身を除く): 237359860

約数列:

[1, 2, 4, 5, 10, 20, 821, 1642, 3284, 4105, 8210, 13109, 16420, 26218, 52436, 65545, 131090, 262180, 10762489, 21524978, 43049956, 53812445, 107624890, 215249780]

約数ペア:

[(1, 215249780), (2, 107624890), (4, 53812445), (5, 43049956), (10, 21524978), (20, 10762489), (821, 262180), (1642, 131090), (3284, 65545), (4105, 52436), (8210, 26218), (13109, 16420)]