21218660

素因数分解:

$2^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{5927}}^1$

素因数の和:6115

約数の個数: 24

約数和(自身を含む): 44815680

約数和(自身を除く): 23597020

約数列:

[1, 2, 4, 5, 10, 20, 179, 358, 716, 895, 1790, 3580, 5927, 11854, 23708, 29635, 59270, 118540, 1060933, 2121866, 4243732, 5304665, 10609330, 21218660]

約数ペア:

[(1, 21218660), (2, 10609330), (4, 5304665), (5, 4243732), (10, 2121866), (20, 1060933), (179, 118540), (358, 59270), (716, 29635), (895, 23708), (1790, 11854), (3580, 5927)]