81779859

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 140175360

約数和(自身を除く): 58395501

約数列:

[1, 3, 7, 9, 21, 47, 63, 71, 141, 213, 329, 389, 423, 497, 639, 987, 1167, 1491, 2723, 2961, 3337, 3501, 4473, 8169, 10011, 18283, 23359, 24507, 27619, 30033, 54849, 70077, 82857, 127981, 164547, 193333, 210231, 248571, 383943, 579999, 1151829, 1298093, 1739997, 3894279, 9086651, 11682837, 27259953, 81779859]

約数ペア:

[(1, 81779859), (3, 27259953), (7, 11682837), (9, 9086651), (21, 3894279), (47, 1739997), (63, 1298093), (71, 1151829), (141, 579999), (213, 383943), (329, 248571), (389, 210231), (423, 193333), (497, 164547), (639, 127981), (987, 82857), (1167, 70077), (1491, 54849), (2723, 30033), (2961, 27619), (3337, 24507), (3501, 23359), (4473, 18283), (8169, 10011)]