20878180

素因数分解:

$2^2\times 5^1\times {\mathrm{251}}^1\times {\mathrm{4159}}^1$

素因数の和:4419

約数の個数: 24

約数和(自身を含む): 44029440

約数和(自身を除く): 23151260

約数列:

[1, 2, 4, 5, 10, 20, 251, 502, 1004, 1255, 2510, 4159, 5020, 8318, 16636, 20795, 41590, 83180, 1043909, 2087818, 4175636, 5219545, 10439090, 20878180]

約数ペア:

[(1, 20878180), (2, 10439090), (4, 5219545), (5, 4175636), (10, 2087818), (20, 1043909), (251, 83180), (502, 41590), (1004, 20795), (1255, 16636), (2510, 8318), (4159, 5020)]