20815180

素因数分解:

$2^2\times 5^1\times {\mathrm{191}}^1\times {\mathrm{5449}}^1$

素因数の和:5649

約数の個数: 24

約数和(自身を含む): 43948800

約数和(自身を除く): 23133620

約数列:

[1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910, 3820, 5449, 10898, 21796, 27245, 54490, 108980, 1040759, 2081518, 4163036, 5203795, 10407590, 20815180]

約数ペア:

[(1, 20815180), (2, 10407590), (4, 5203795), (5, 4163036), (10, 2081518), (20, 1040759), (191, 108980), (382, 54490), (764, 27245), (955, 21796), (1910, 10898), (3820, 5449)]