21991600

素因数分解:

$2^4\times 5^2\times {\mathrm{54979}}^1$

素因数の和:54997

約数の個数: 30

約数和(自身を含む): 52835780

約数和(自身を除く): 30844180

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 54979, 109958, 219916, 274895, 439832, 549790, 879664, 1099580, 1374475, 2199160, 2748950, 4398320, 5497900, 10995800, 21991600]

約数ペア:

[(1, 21991600), (2, 10995800), (4, 5497900), (5, 4398320), (8, 2748950), (10, 2199160), (16, 1374475), (20, 1099580), (25, 879664), (40, 549790), (50, 439832), (80, 274895), (100, 219916), (200, 109958), (400, 54979)]