21217755

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{2053}}^1$

素因数の和:2127

約数の個数: 32

約数和(自身を含む): 37267776

約数和(自身を除く): 16050021

約数列:

[1, 3, 5, 13, 15, 39, 53, 65, 159, 195, 265, 689, 795, 2053, 2067, 3445, 6159, 10265, 10335, 26689, 30795, 80067, 108809, 133445, 326427, 400335, 544045, 1414517, 1632135, 4243551, 7072585, 21217755]

約数ペア:

[(1, 21217755), (3, 7072585), (5, 4243551), (13, 1632135), (15, 1414517), (39, 544045), (53, 400335), (65, 326427), (159, 133445), (195, 108809), (265, 80067), (689, 30795), (795, 26689), (2053, 10335), (2067, 10265), (3445, 6159)]