20493640

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{3911}}^1$

素因数の和:4053

約数の個数: 32

約数和(自身を含む): 46474560

約数和(自身を除く): 25980920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 3911, 5240, 7822, 15644, 19555, 31288, 39110, 78220, 156440, 512341, 1024682, 2049364, 2561705, 4098728, 5123410, 10246820, 20493640]

約数ペア:

[(1, 20493640), (2, 10246820), (4, 5123410), (5, 4098728), (8, 2561705), (10, 2049364), (20, 1024682), (40, 512341), (131, 156440), (262, 78220), (524, 39110), (655, 31288), (1048, 19555), (1310, 15644), (2620, 7822), (3911, 5240)]