19985790

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{853}}^1$

素因数の和:945

約数の個数: 64

約数和(自身を含む): 53125632

約数和(自身を除く): 33139842

約数列:

[1, 2, 3, 5, 6, 10, 11, 15, 22, 30, 33, 55, 66, 71, 110, 142, 165, 213, 330, 355, 426, 710, 781, 853, 1065, 1562, 1706, 2130, 2343, 2559, 3905, 4265, 4686, 5118, 7810, 8530, 9383, 11715, 12795, 18766, 23430, 25590, 28149, 46915, 56298, 60563, 93830, 121126, 140745, 181689, 281490, 302815, 363378, 605630, 666193, 908445, 1332386, 1816890, 1998579, 3330965, 3997158, 6661930, 9992895, 19985790]

約数ペア:

[(1, 19985790), (2, 9992895), (3, 6661930), (5, 3997158), (6, 3330965), (10, 1998579), (11, 1816890), (15, 1332386), (22, 908445), (30, 666193), (33, 605630), (55, 363378), (66, 302815), (71, 281490), (110, 181689), (142, 140745), (165, 121126), (213, 93830), (330, 60563), (355, 56298), (426, 46915), (710, 28149), (781, 25590), (853, 23430), (1065, 18766), (1562, 12795), (1706, 11715), (2130, 9383), (2343, 8530), (2559, 7810), (3905, 5118), (4265, 4686)]