2680405

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1$

素因数の和:205

約数の個数: 32

約数和(自身を含む): 4080384

約数和(自身を除く): 1399979

約数列:

[1, 5, 7, 13, 35, 43, 65, 91, 137, 215, 301, 455, 559, 685, 959, 1505, 1781, 2795, 3913, 4795, 5891, 8905, 12467, 19565, 29455, 41237, 62335, 76583, 206185, 382915, 536081, 2680405]

約数ペア:

[(1, 2680405), (5, 536081), (7, 382915), (13, 206185), (35, 76583), (43, 62335), (65, 41237), (91, 29455), (137, 19565), (215, 12467), (301, 8905), (455, 5891), (559, 4795), (685, 3913), (959, 2795), (1505, 1781)]