20881770

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7649}}^1$

素因数の和:7679

約数の個数: 64

約数和(自身を含む): 61689600

約数和(自身を除く): 40807830

約数列:

[1, 2, 3, 5, 6, 7, 10, 13, 14, 15, 21, 26, 30, 35, 39, 42, 65, 70, 78, 91, 105, 130, 182, 195, 210, 273, 390, 455, 546, 910, 1365, 2730, 7649, 15298, 22947, 38245, 45894, 53543, 76490, 99437, 107086, 114735, 160629, 198874, 229470, 267715, 298311, 321258, 497185, 535430, 596622, 696059, 803145, 994370, 1392118, 1491555, 1606290, 2088177, 2983110, 3480295, 4176354, 6960590, 10440885, 20881770]

約数ペア:

[(1, 20881770), (2, 10440885), (3, 6960590), (5, 4176354), (6, 3480295), (7, 2983110), (10, 2088177), (13, 1606290), (14, 1491555), (15, 1392118), (21, 994370), (26, 803145), (30, 696059), (35, 596622), (39, 535430), (42, 497185), (65, 321258), (70, 298311), (78, 267715), (91, 229470), (105, 198874), (130, 160629), (182, 114735), (195, 107086), (210, 99437), (273, 76490), (390, 53543), (455, 45894), (546, 38245), (910, 22947), (1365, 15298), (2730, 7649)]