19728180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{863}}^1$

素因数の和:1005

約数の個数: 72

約数和(自身を含む): 60383232

約数和(自身を除く): 40655052

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 127, 180, 254, 381, 508, 635, 762, 863, 1143, 1270, 1524, 1726, 1905, 2286, 2540, 2589, 3452, 3810, 4315, 4572, 5178, 5715, 7620, 7767, 8630, 10356, 11430, 12945, 15534, 17260, 22860, 25890, 31068, 38835, 51780, 77670, 109601, 155340, 219202, 328803, 438404, 548005, 657606, 986409, 1096010, 1315212, 1644015, 1972818, 2192020, 3288030, 3945636, 4932045, 6576060, 9864090, 19728180]

約数ペア:

[(1, 19728180), (2, 9864090), (3, 6576060), (4, 4932045), (5, 3945636), (6, 3288030), (9, 2192020), (10, 1972818), (12, 1644015), (15, 1315212), (18, 1096010), (20, 986409), (30, 657606), (36, 548005), (45, 438404), (60, 328803), (90, 219202), (127, 155340), (180, 109601), (254, 77670), (381, 51780), (508, 38835), (635, 31068), (762, 25890), (863, 22860), (1143, 17260), (1270, 15534), (1524, 12945), (1726, 11430), (1905, 10356), (2286, 8630), (2540, 7767), (2589, 7620), (3452, 5715), (3810, 5178), (4315, 4572)]