1620996980

素因数分解:

$2^2\times 5^1\times {\mathrm{1871}}^1\times {\mathrm{43319}}^1$

素因数の和:45199

約数の個数: 24

約数和(自身を含む): 3405991680

約数和(自身を除く): 1784994700

約数列:

[1, 2, 4, 5, 10, 20, 1871, 3742, 7484, 9355, 18710, 37420, 43319, 86638, 173276, 216595, 433190, 866380, 81049849, 162099698, 324199396, 405249245, 810498490, 1620996980]

約数ペア:

[(1, 1620996980), (2, 810498490), (4, 405249245), (5, 324199396), (10, 162099698), (20, 81049849), (1871, 866380), (3742, 433190), (7484, 216595), (9355, 173276), (18710, 86638), (37420, 43319)]