20159865

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{293}}^1$

素因数の和:454

約数の個数: 48

約数和(自身を含む): 38525760

約数和(自身を除く): 18365895

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 139, 165, 293, 417, 495, 695, 879, 1251, 1465, 1529, 2085, 2637, 3223, 4395, 4587, 6255, 7645, 9669, 13185, 13761, 16115, 22935, 29007, 40727, 48345, 68805, 122181, 145035, 203635, 366543, 447997, 610905, 1343991, 1832715, 2239985, 4031973, 6719955, 20159865]

約数ペア:

[(1, 20159865), (3, 6719955), (5, 4031973), (9, 2239985), (11, 1832715), (15, 1343991), (33, 610905), (45, 447997), (55, 366543), (99, 203635), (139, 145035), (165, 122181), (293, 68805), (417, 48345), (495, 40727), (695, 29007), (879, 22935), (1251, 16115), (1465, 13761), (1529, 13185), (2085, 9669), (2637, 7645), (3223, 6255), (4395, 4587)]