20464780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1151}}^1$

素因数の和:1294

約数の個数: 48

約数和(自身を含む): 49545216

約数和(自身を除く): 29080436

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1151, 1270, 1778, 2302, 2540, 3556, 4445, 4604, 5755, 8057, 8890, 11510, 16114, 17780, 23020, 32228, 40285, 80570, 146177, 161140, 292354, 584708, 730885, 1023239, 1461770, 2046478, 2923540, 4092956, 5116195, 10232390, 20464780]

約数ペア:

[(1, 20464780), (2, 10232390), (4, 5116195), (5, 4092956), (7, 2923540), (10, 2046478), (14, 1461770), (20, 1023239), (28, 730885), (35, 584708), (70, 292354), (127, 161140), (140, 146177), (254, 80570), (508, 40285), (635, 32228), (889, 23020), (1151, 17780), (1270, 16114), (1778, 11510), (2302, 8890), (2540, 8057), (3556, 5755), (4445, 4604)]