64986980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{41131}}^1$

素因数の和:41219

約数の個数: 24

約数和(自身を含む): 138203520

約数和(自身を除く): 73216540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 41131, 82262, 164524, 205655, 411310, 822620, 3249349, 6498698, 12997396, 16246745, 32493490, 64986980]

約数ペア:

[(1, 64986980), (2, 32493490), (4, 16246745), (5, 12997396), (10, 6498698), (20, 3249349), (79, 822620), (158, 411310), (316, 205655), (395, 164524), (790, 82262), (1580, 41131)]