19882485

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:223

約数の個数: 72

約数和(自身を含む): 40974336

約数和(自身を除く): 21091851

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 71, 105, 127, 147, 213, 245, 315, 355, 381, 441, 497, 635, 639, 735, 889, 1065, 1143, 1491, 1905, 2205, 2485, 2667, 3195, 3479, 4445, 4473, 5715, 6223, 7455, 8001, 9017, 10437, 13335, 17395, 18669, 22365, 27051, 31115, 31311, 40005, 45085, 52185, 56007, 63119, 81153, 93345, 135255, 156555, 189357, 280035, 315595, 405765, 441833, 568071, 946785, 1325499, 2209165, 2840355, 3976497, 6627495, 19882485]

約数ペア:

[(1, 19882485), (3, 6627495), (5, 3976497), (7, 2840355), (9, 2209165), (15, 1325499), (21, 946785), (35, 568071), (45, 441833), (49, 405765), (63, 315595), (71, 280035), (105, 189357), (127, 156555), (147, 135255), (213, 93345), (245, 81153), (315, 63119), (355, 56007), (381, 52185), (441, 45085), (497, 40005), (635, 31311), (639, 31115), (735, 27051), (889, 22365), (1065, 18669), (1143, 17395), (1491, 13335), (1905, 10437), (2205, 9017), (2485, 8001), (2667, 7455), (3195, 6223), (3479, 5715), (4445, 4473)]