81581480

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{18049}}^1$

素因数の和:18173

約数の個数: 32

約数和(自身を含む): 185193000

約数和(自身を除く): 103611520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4520, 18049, 36098, 72196, 90245, 144392, 180490, 360980, 721960, 2039537, 4079074, 8158148, 10197685, 16316296, 20395370, 40790740, 81581480]

約数ペア:

[(1, 81581480), (2, 40790740), (4, 20395370), (5, 16316296), (8, 10197685), (10, 8158148), (20, 4079074), (40, 2039537), (113, 721960), (226, 360980), (452, 180490), (565, 144392), (904, 90245), (1130, 72196), (2260, 36098), (4520, 18049)]