20486980

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{7477}}^1$

素因数の和:7623

約数の個数: 24

約数和(自身を含む): 43342488

約数和(自身を除く): 22855508

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 548, 685, 1370, 2740, 7477, 14954, 29908, 37385, 74770, 149540, 1024349, 2048698, 4097396, 5121745, 10243490, 20486980]

約数ペア:

[(1, 20486980), (2, 10243490), (4, 5121745), (5, 4097396), (10, 2048698), (20, 1024349), (137, 149540), (274, 74770), (548, 37385), (685, 29908), (1370, 14954), (2740, 7477)]