21103480

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3851}}^1$

素因数の和:3999

約数の個数: 32

約数和(自身を含む): 47841840

約数和(自身を除く): 26738360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3851, 5480, 7702, 15404, 19255, 30808, 38510, 77020, 154040, 527587, 1055174, 2110348, 2637935, 4220696, 5275870, 10551740, 21103480]

約数ペア:

[(1, 21103480), (2, 10551740), (4, 5275870), (5, 4220696), (8, 2637935), (10, 2110348), (20, 1055174), (40, 527587), (137, 154040), (274, 77020), (548, 38510), (685, 30808), (1096, 19255), (1370, 15404), (2740, 7702), (3851, 5480)]