21531861

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{2521}}^1$

素因数の和:2613

約数の個数: 24

約数和(自身を含む): 33966296

約数和(自身を除く): 12434435

約数列:

[1, 3, 9, 13, 39, 73, 117, 219, 657, 949, 2521, 2847, 7563, 8541, 22689, 32773, 98319, 184033, 294957, 552099, 1656297, 2392429, 7177287, 21531861]

約数ペア:

[(1, 21531861), (3, 7177287), (9, 2392429), (13, 1656297), (39, 552099), (73, 294957), (117, 184033), (219, 98319), (657, 32773), (949, 22689), (2521, 8541), (2847, 7563)]