19800045

素因数分解:

$3^4\times 5^1\times {\mathrm{48889}}^1$

素因数の和:48906

約数の個数: 20

約数和(自身を含む): 35494140

約数和(自身を除く): 15694095

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 48889, 146667, 244445, 440001, 733335, 1320003, 2200005, 3960009, 6600015, 19800045]

約数ペア:

[(1, 19800045), (3, 6600015), (5, 3960009), (9, 2200005), (15, 1320003), (27, 733335), (45, 440001), (81, 244445), (135, 146667), (405, 48889)]