20842780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{53}}^3$

素因数の和:175

約数の個数: 48

約数和(自身を含む): 50984640

約数和(自身を除く): 30141860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 53, 70, 106, 140, 212, 265, 371, 530, 742, 1060, 1484, 1855, 2809, 3710, 5618, 7420, 11236, 14045, 19663, 28090, 39326, 56180, 78652, 98315, 148877, 196630, 297754, 393260, 595508, 744385, 1042139, 1488770, 2084278, 2977540, 4168556, 5210695, 10421390, 20842780]

約数ペア:

[(1, 20842780), (2, 10421390), (4, 5210695), (5, 4168556), (7, 2977540), (10, 2084278), (14, 1488770), (20, 1042139), (28, 744385), (35, 595508), (53, 393260), (70, 297754), (106, 196630), (140, 148877), (212, 98315), (265, 78652), (371, 56180), (530, 39326), (742, 28090), (1060, 19663), (1484, 14045), (1855, 11236), (2809, 7420), (3710, 5618)]