20311265

素因数分解:

$5^1\times {\mathrm{13}}^3\times {\mathrm{43}}^2$

素因数の和:130

約数の個数: 24

約数和(自身を含む): 27032040

約数和(自身を除く): 6720775

約数列:

[1, 5, 13, 43, 65, 169, 215, 559, 845, 1849, 2197, 2795, 7267, 9245, 10985, 24037, 36335, 94471, 120185, 312481, 472355, 1562405, 4062253, 20311265]

約数ペア:

[(1, 20311265), (5, 4062253), (13, 1562405), (43, 472355), (65, 312481), (169, 120185), (215, 94471), (559, 36335), (845, 24037), (1849, 10985), (2197, 9245), (2795, 7267)]