21985045

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:205

約数の個数: 32

約数和(自身を含む): 28984320

約数和(自身を除く): 6999275

約数列:

[1, 5, 29, 31, 67, 73, 145, 155, 335, 365, 899, 1943, 2077, 2117, 2263, 4495, 4891, 9715, 10385, 10585, 11315, 24455, 60233, 65627, 141839, 151621, 301165, 328135, 709195, 758105, 4397009, 21985045]

約数ペア:

[(1, 21985045), (5, 4397009), (29, 758105), (31, 709195), (67, 328135), (73, 301165), (145, 151621), (155, 141839), (335, 65627), (365, 60233), (899, 24455), (1943, 11315), (2077, 10585), (2117, 10385), (2263, 9715), (4495, 4891)]