20087781

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{251}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 31868928

約数和(自身を除く): 11781147

約数列:

[1, 3, 7, 21, 37, 103, 111, 251, 259, 309, 721, 753, 777, 1757, 2163, 3811, 5271, 9287, 11433, 25853, 26677, 27861, 65009, 77559, 80031, 180971, 195027, 542913, 956561, 2869683, 6695927, 20087781]

約数ペア:

[(1, 20087781), (3, 6695927), (7, 2869683), (21, 956561), (37, 542913), (103, 195027), (111, 180971), (251, 80031), (259, 77559), (309, 65009), (721, 27861), (753, 26677), (777, 25853), (1757, 11433), (2163, 9287), (3811, 5271)]