20518888

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{197297}}^1$

素因数の和:197316

約数の個数: 16

約数和(自身を含む): 41432580

約数和(自身を除く): 20913692

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 197297, 394594, 789188, 1578376, 2564861, 5129722, 10259444, 20518888]

約数ペア:

[(1, 20518888), (2, 10259444), (4, 5129722), (8, 2564861), (13, 1578376), (26, 789188), (52, 394594), (104, 197297)]