64809740

素因数分解:

$2^2\times 5^1\times {\mathrm{821}}^1\times {\mathrm{3947}}^1$

素因数の和:4777

約数の個数: 24

約数和(自身を含む): 136300752

約数和(自身を除く): 71491012

約数列:

[1, 2, 4, 5, 10, 20, 821, 1642, 3284, 3947, 4105, 7894, 8210, 15788, 16420, 19735, 39470, 78940, 3240487, 6480974, 12961948, 16202435, 32404870, 64809740]

約数ペア:

[(1, 64809740), (2, 32404870), (4, 16202435), (5, 12961948), (10, 6480974), (20, 3240487), (821, 78940), (1642, 39470), (3284, 19735), (3947, 16420), (4105, 15788), (7894, 8210)]