18520010

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{20809}}^1$

素因数の和:20905

約数の個数: 16

約数和(自身を含む): 33712200

約数和(自身を除く): 15192190

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 20809, 41618, 104045, 208090, 1852001, 3704002, 9260005, 18520010]

約数ペア:

[(1, 18520010), (2, 9260005), (5, 3704002), (10, 1852001), (89, 208090), (178, 104045), (445, 41618), (890, 20809)]