20965940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24379}}^1$

素因数の和:24431

約数の個数: 24

約数和(自身を含む): 45054240

約数和(自身を除く): 24088300

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24379, 48758, 97516, 121895, 243790, 487580, 1048297, 2096594, 4193188, 5241485, 10482970, 20965940]

約数ペア:

[(1, 20965940), (2, 10482970), (4, 5241485), (5, 4193188), (10, 2096594), (20, 1048297), (43, 487580), (86, 243790), (172, 121895), (215, 97516), (430, 48758), (860, 24379)]