20418890

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{28759}}^1$

素因数の和:28837

約数の個数: 16

約数和(自身を含む): 37272960

約数和(自身を除く): 16854070

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 28759, 57518, 143795, 287590, 2041889, 4083778, 10209445, 20418890]

約数ペア:

[(1, 20418890), (2, 10209445), (5, 4083778), (10, 2041889), (71, 287590), (142, 143795), (355, 57518), (710, 28759)]