20456840

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3733}}^1$

素因数の和:3881

約数の個数: 32

約数和(自身を含む): 46376280

約数和(自身を除く): 25919440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3733, 5480, 7466, 14932, 18665, 29864, 37330, 74660, 149320, 511421, 1022842, 2045684, 2557105, 4091368, 5114210, 10228420, 20456840]

約数ペア:

[(1, 20456840), (2, 10228420), (4, 5114210), (5, 4091368), (8, 2557105), (10, 2045684), (20, 1022842), (40, 511421), (137, 149320), (274, 74660), (548, 37330), (685, 29864), (1096, 18665), (1370, 14932), (2740, 7466), (3733, 5480)]