20178440

素因数分解:

$2^3\times 5^1\times {\mathrm{504461}}^1$

素因数の和:504472

約数の個数: 16

約数和(自身を含む): 45401580

約数和(自身を除く): 25223140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 504461, 1008922, 2017844, 2522305, 4035688, 5044610, 10089220, 20178440]

約数ペア:

[(1, 20178440), (2, 10089220), (4, 5044610), (5, 4035688), (8, 2522305), (10, 2017844), (20, 1008922), (40, 504461)]