678440440

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{123803}}^1$

素因数の和:123951

約数の個数: 32

約数和(自身を含む): 1537645680

約数和(自身を除く): 859205240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 5480, 123803, 247606, 495212, 619015, 990424, 1238030, 2476060, 4952120, 16961011, 33922022, 67844044, 84805055, 135688088, 169610110, 339220220, 678440440]

約数ペア:

[(1, 678440440), (2, 339220220), (4, 169610110), (5, 135688088), (8, 84805055), (10, 67844044), (20, 33922022), (40, 16961011), (137, 4952120), (274, 2476060), (548, 1238030), (685, 990424), (1096, 619015), (1370, 495212), (2740, 247606), (5480, 123803)]