19999278

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{919}}^1$

素因数の和:974

約数の個数: 64

約数和(自身を含む): 49459200

約数和(自身を除く): 29459922

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 31, 39, 54, 62, 78, 93, 117, 186, 234, 279, 351, 403, 558, 702, 806, 837, 919, 1209, 1674, 1838, 2418, 2757, 3627, 5514, 7254, 8271, 10881, 11947, 16542, 21762, 23894, 24813, 28489, 35841, 49626, 56978, 71682, 85467, 107523, 170934, 215046, 256401, 322569, 370357, 512802, 645138, 740714, 769203, 1111071, 1538406, 2222142, 3333213, 6666426, 9999639, 19999278]

約数ペア:

[(1, 19999278), (2, 9999639), (3, 6666426), (6, 3333213), (9, 2222142), (13, 1538406), (18, 1111071), (26, 769203), (27, 740714), (31, 645138), (39, 512802), (54, 370357), (62, 322569), (78, 256401), (93, 215046), (117, 170934), (186, 107523), (234, 85467), (279, 71682), (351, 56978), (403, 49626), (558, 35841), (702, 28489), (806, 24813), (837, 23894), (919, 21762), (1209, 16542), (1674, 11947), (1838, 10881), (2418, 8271), (2757, 7254), (3627, 5514)]