21266985

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{1051}}^1$

素因数の和:1149

約数の個数: 32

約数和(自身を含む): 36357120

約数和(自身を除く): 15090135

約数列:

[1, 3, 5, 15, 19, 57, 71, 95, 213, 285, 355, 1051, 1065, 1349, 3153, 4047, 5255, 6745, 15765, 19969, 20235, 59907, 74621, 99845, 223863, 299535, 373105, 1119315, 1417799, 4253397, 7088995, 21266985]

約数ペア:

[(1, 21266985), (3, 7088995), (5, 4253397), (15, 1417799), (19, 1119315), (57, 373105), (71, 299535), (95, 223863), (213, 99845), (285, 74621), (355, 59907), (1051, 20235), (1065, 19969), (1349, 15765), (3153, 6745), (4047, 5255)]