256871920

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{1289}}^1$

素因数の和:1402

約数の個数: 80

約数和(自身を含む): 621924480

約数和(自身を除く): 365052560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 53, 80, 94, 106, 188, 212, 235, 265, 376, 424, 470, 530, 752, 848, 940, 1060, 1289, 1880, 2120, 2491, 2578, 3760, 4240, 4982, 5156, 6445, 9964, 10312, 12455, 12890, 19928, 20624, 24910, 25780, 39856, 49820, 51560, 60583, 68317, 99640, 103120, 121166, 136634, 199280, 242332, 273268, 302915, 341585, 484664, 546536, 605830, 683170, 969328, 1093072, 1211660, 1366340, 2423320, 2732680, 3210899, 4846640, 5465360, 6421798, 12843596, 16054495, 25687192, 32108990, 51374384, 64217980, 128435960, 256871920]

約数ペア:

[(1, 256871920), (2, 128435960), (4, 64217980), (5, 51374384), (8, 32108990), (10, 25687192), (16, 16054495), (20, 12843596), (40, 6421798), (47, 5465360), (53, 4846640), (80, 3210899), (94, 2732680), (106, 2423320), (188, 1366340), (212, 1211660), (235, 1093072), (265, 969328), (376, 683170), (424, 605830), (470, 546536), (530, 484664), (752, 341585), (848, 302915), (940, 273268), (1060, 242332), (1289, 199280), (1880, 136634), (2120, 121166), (2491, 103120), (2578, 99640), (3760, 68317), (4240, 60583), (4982, 51560), (5156, 49820), (6445, 39856), (9964, 25780), (10312, 24910), (12455, 20624), (12890, 19928)]