21066860

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{1283}}^1$

素因数の和:2113

約数の個数: 24

約数和(自身を含む): 44328816

約数和(自身を除く): 23261956

約数列:

[1, 2, 4, 5, 10, 20, 821, 1283, 1642, 2566, 3284, 4105, 5132, 6415, 8210, 12830, 16420, 25660, 1053343, 2106686, 4213372, 5266715, 10533430, 21066860]

約数ペア:

[(1, 21066860), (2, 10533430), (4, 5266715), (5, 4213372), (10, 2106686), (20, 1053343), (821, 25660), (1283, 16420), (1642, 12830), (2566, 8210), (3284, 6415), (4105, 5132)]