638420

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{233}}^1$

素因数の和:379

約数の個数: 24

約数和(自身を含む): 1356264

約数和(自身を除く): 717844

約数列:

[1, 2, 4, 5, 10, 20, 137, 233, 274, 466, 548, 685, 932, 1165, 1370, 2330, 2740, 4660, 31921, 63842, 127684, 159605, 319210, 638420]

約数ペア:

[(1, 638420), (2, 319210), (4, 159605), (5, 127684), (10, 63842), (20, 31921), (137, 4660), (233, 2740), (274, 2330), (466, 1370), (548, 1165), (685, 932)]