20159980

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{7937}}^1$

素因数の和:8073

約数の個数: 24

約数和(自身を含む): 42674688

約数和(自身を除く): 22514708

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 7937, 15874, 31748, 39685, 79370, 158740, 1007999, 2015998, 4031996, 5039995, 10079990, 20159980]

約数ペア:

[(1, 20159980), (2, 10079990), (4, 5039995), (5, 4031996), (10, 2015998), (20, 1007999), (127, 158740), (254, 79370), (508, 39685), (635, 31748), (1270, 15874), (2540, 7937)]