20990307

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{2179}}^1$

素因数の和:2227

約数の個数: 24

約数和(自身を含む): 31915200

約数和(自身を除く): 10924893

約数列:

[1, 3, 13, 19, 39, 57, 169, 247, 507, 741, 2179, 3211, 6537, 9633, 28327, 41401, 84981, 124203, 368251, 538213, 1104753, 1614639, 6996769, 20990307]

約数ペア:

[(1, 20990307), (3, 6996769), (13, 1614639), (19, 1104753), (39, 538213), (57, 368251), (169, 124203), (247, 84981), (507, 41401), (741, 28327), (2179, 9633), (3211, 6537)]