25213480

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{137}}^1$

素因数の和:298

約数の個数: 64

約数和(自身を含む): 59019840

約数和(自身を除く): 33806360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 107, 137, 172, 214, 215, 274, 344, 428, 430, 535, 548, 685, 856, 860, 1070, 1096, 1370, 1720, 2140, 2740, 4280, 4601, 5480, 5891, 9202, 11782, 14659, 18404, 23005, 23564, 29318, 29455, 36808, 46010, 47128, 58636, 58910, 73295, 92020, 117272, 117820, 146590, 184040, 235640, 293180, 586360, 630337, 1260674, 2521348, 3151685, 5042696, 6303370, 12606740, 25213480]

約数ペア:

[(1, 25213480), (2, 12606740), (4, 6303370), (5, 5042696), (8, 3151685), (10, 2521348), (20, 1260674), (40, 630337), (43, 586360), (86, 293180), (107, 235640), (137, 184040), (172, 146590), (214, 117820), (215, 117272), (274, 92020), (344, 73295), (428, 58910), (430, 58636), (535, 47128), (548, 46010), (685, 36808), (856, 29455), (860, 29318), (1070, 23564), (1096, 23005), (1370, 18404), (1720, 14659), (2140, 11782), (2740, 9202), (4280, 5891), (4601, 5480)]