21198945

素因数分解:

$3^1\times 5^1\times {\mathrm{103}}^1\times {\mathrm{13721}}^1$

素因数の和:13832

約数の個数: 16

約数和(自身を含む): 34250112

約数和(自身を除く): 13051167

約数列:

[1, 3, 5, 15, 103, 309, 515, 1545, 13721, 41163, 68605, 205815, 1413263, 4239789, 7066315, 21198945]

約数ペア:

[(1, 21198945), (3, 7066315), (5, 4239789), (15, 1413263), (103, 205815), (309, 68605), (515, 41163), (1545, 13721)]