20105480

素因数分解:

$2^3\times 5^1\times {\mathrm{181}}^1\times {\mathrm{2777}}^1$

素因数の和:2969

約数の個数: 32

約数和(自身を含む): 45503640

約数和(自身を除く): 25398160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 181, 362, 724, 905, 1448, 1810, 2777, 3620, 5554, 7240, 11108, 13885, 22216, 27770, 55540, 111080, 502637, 1005274, 2010548, 2513185, 4021096, 5026370, 10052740, 20105480]

約数ペア:

[(1, 20105480), (2, 10052740), (4, 5026370), (5, 4021096), (8, 2513185), (10, 2010548), (20, 1005274), (40, 502637), (181, 111080), (362, 55540), (724, 27770), (905, 22216), (1448, 13885), (1810, 11108), (2777, 7240), (3620, 5554)]