21512151

素因数分解:

$3^2\times {\mathrm{73}}^1\times {\mathrm{137}}^1\times {\mathrm{239}}^1$

素因数の和:455

約数の個数: 24

約数和(自身を含む): 31861440

約数和(自身を除く): 10349289

約数列:

[1, 3, 9, 73, 137, 219, 239, 411, 657, 717, 1233, 2151, 10001, 17447, 30003, 32743, 52341, 90009, 98229, 157023, 294687, 2390239, 7170717, 21512151]

約数ペア:

[(1, 21512151), (3, 7170717), (9, 2390239), (73, 294687), (137, 157023), (219, 98229), (239, 90009), (411, 52341), (657, 32743), (717, 30003), (1233, 17447), (2151, 10001)]