21242020

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{8363}}^1$

素因数の和:8499

約数の個数: 24

約数和(自身を含む): 44964864

約数和(自身を除く): 23722844

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 8363, 16726, 33452, 41815, 83630, 167260, 1062101, 2124202, 4248404, 5310505, 10621010, 21242020]

約数ペア:

[(1, 21242020), (2, 10621010), (4, 5310505), (5, 4248404), (10, 2124202), (20, 1062101), (127, 167260), (254, 83630), (508, 41815), (635, 33452), (1270, 16726), (2540, 8363)]