28251140

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{2137}}^1$

素因数の和:2807

約数の個数: 24

約数和(自身を含む): 59444952

約数和(自身を除く): 31193812

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 2137, 2644, 3305, 4274, 6610, 8548, 10685, 13220, 21370, 42740, 1412557, 2825114, 5650228, 7062785, 14125570, 28251140]

約数ペア:

[(1, 28251140), (2, 14125570), (4, 7062785), (5, 5650228), (10, 2825114), (20, 1412557), (661, 42740), (1322, 21370), (2137, 13220), (2644, 10685), (3305, 8548), (4274, 6610)]