21490940

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{8461}}^1$

素因数の和:8597

約数の個数: 24

約数和(自身を含む): 45491712

約数和(自身を除く): 24000772

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 8461, 16922, 33844, 42305, 84610, 169220, 1074547, 2149094, 4298188, 5372735, 10745470, 21490940]

約数ペア:

[(1, 21490940), (2, 10745470), (4, 5372735), (5, 4298188), (10, 2149094), (20, 1074547), (127, 169220), (254, 84610), (508, 42305), (635, 33844), (1270, 16922), (2540, 8461)]