21409660

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{8429}}^1$

素因数の和:8565

約数の個数: 24

約数和(自身を含む): 45319680

約数和(自身を除く): 23910020

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 8429, 16858, 33716, 42145, 84290, 168580, 1070483, 2140966, 4281932, 5352415, 10704830, 21409660]

約数ペア:

[(1, 21409660), (2, 10704830), (4, 5352415), (5, 4281932), (10, 2140966), (20, 1070483), (127, 168580), (254, 84290), (508, 42145), (635, 33716), (1270, 16858), (2540, 8429)]