64896980

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{4909}}^1$

素因数の和:5579

約数の個数: 24

約数和(自身を含む): 136517640

約数和(自身を除く): 71620660

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 2644, 3305, 4909, 6610, 9818, 13220, 19636, 24545, 49090, 98180, 3244849, 6489698, 12979396, 16224245, 32448490, 64896980]

約数ペア:

[(1, 64896980), (2, 32448490), (4, 16224245), (5, 12979396), (10, 6489698), (20, 3244849), (661, 98180), (1322, 49090), (2644, 24545), (3305, 19636), (4909, 13220), (6610, 9818)]