12488920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:244

約数の個数: 64

約数和(自身を含む): 29509920

約数和(自身を除く): 17021000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 53, 86, 106, 137, 172, 212, 215, 265, 274, 344, 424, 430, 530, 548, 685, 860, 1060, 1096, 1370, 1720, 2120, 2279, 2740, 4558, 5480, 5891, 7261, 9116, 11395, 11782, 14522, 18232, 22790, 23564, 29044, 29455, 36305, 45580, 47128, 58088, 58910, 72610, 91160, 117820, 145220, 235640, 290440, 312223, 624446, 1248892, 1561115, 2497784, 3122230, 6244460, 12488920]

約数ペア:

[(1, 12488920), (2, 6244460), (4, 3122230), (5, 2497784), (8, 1561115), (10, 1248892), (20, 624446), (40, 312223), (43, 290440), (53, 235640), (86, 145220), (106, 117820), (137, 91160), (172, 72610), (212, 58910), (215, 58088), (265, 47128), (274, 45580), (344, 36305), (424, 29455), (430, 29044), (530, 23564), (548, 22790), (685, 18232), (860, 14522), (1060, 11782), (1096, 11395), (1370, 9116), (1720, 7261), (2120, 5891), (2279, 5480), (2740, 4558)]