51439280

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{347}}^1$

素因数の和:486

約数の個数: 80

約数和(自身を含む): 128161440

約数和(自身を除く): 76722160

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 109, 136, 170, 218, 272, 340, 347, 436, 545, 680, 694, 872, 1090, 1360, 1388, 1735, 1744, 1853, 2180, 2776, 3470, 3706, 4360, 5552, 5899, 6940, 7412, 8720, 9265, 11798, 13880, 14824, 18530, 23596, 27760, 29495, 29648, 37060, 37823, 47192, 58990, 74120, 75646, 94384, 117980, 148240, 151292, 189115, 235960, 302584, 378230, 471920, 605168, 642991, 756460, 1285982, 1512920, 2571964, 3025840, 3214955, 5143928, 6429910, 10287856, 12859820, 25719640, 51439280]

約数ペア:

[(1, 51439280), (2, 25719640), (4, 12859820), (5, 10287856), (8, 6429910), (10, 5143928), (16, 3214955), (17, 3025840), (20, 2571964), (34, 1512920), (40, 1285982), (68, 756460), (80, 642991), (85, 605168), (109, 471920), (136, 378230), (170, 302584), (218, 235960), (272, 189115), (340, 151292), (347, 148240), (436, 117980), (545, 94384), (680, 75646), (694, 74120), (872, 58990), (1090, 47192), (1360, 37823), (1388, 37060), (1735, 29648), (1744, 29495), (1853, 27760), (2180, 23596), (2776, 18530), (3470, 14824), (3706, 13880), (4360, 11798), (5552, 9265), (5899, 8720), (6940, 7412)]