64742980

素因数分解:

$2^2\times 5^1\times {\mathrm{1279}}^1\times {\mathrm{2531}}^1$

素因数の和:3819

約数の個数: 24

約数和(自身を含む): 136120320

約数和(自身を除く): 71377340

約数列:

[1, 2, 4, 5, 10, 20, 1279, 2531, 2558, 5062, 5116, 6395, 10124, 12655, 12790, 25310, 25580, 50620, 3237149, 6474298, 12948596, 16185745, 32371490, 64742980]

約数ペア:

[(1, 64742980), (2, 32371490), (4, 16185745), (5, 12948596), (10, 6474298), (20, 3237149), (1279, 50620), (2531, 25580), (2558, 25310), (5062, 12790), (5116, 12655), (6395, 10124)]