20157255

素因数分解:

$3^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{701}}^1$

素因数の和:789

約数の個数: 40

約数和(自身を含む): 36694944

約数和(自身を除く): 16537689

約数列:

[1, 3, 5, 9, 15, 27, 45, 71, 81, 135, 213, 355, 405, 639, 701, 1065, 1917, 2103, 3195, 3505, 5751, 6309, 9585, 10515, 18927, 28755, 31545, 49771, 56781, 94635, 149313, 248855, 283905, 447939, 746565, 1343817, 2239695, 4031451, 6719085, 20157255]

約数ペア:

[(1, 20157255), (3, 6719085), (5, 4031451), (9, 2239695), (15, 1343817), (27, 746565), (45, 447939), (71, 283905), (81, 248855), (135, 149313), (213, 94635), (355, 56781), (405, 49771), (639, 31545), (701, 28755), (1065, 18927), (1917, 10515), (2103, 9585), (3195, 6309), (3505, 5751)]