21919005

素因数分解:

$3^4\times 5^1\times {\mathrm{54121}}^1$

素因数の和:54138

約数の個数: 20

約数和(自身を含む): 39292572

約数和(自身を除く): 17373567

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 54121, 162363, 270605, 487089, 811815, 1461267, 2435445, 4383801, 7306335, 21919005]

約数ペア:

[(1, 21919005), (3, 7306335), (5, 4383801), (9, 2435445), (15, 1461267), (27, 811815), (45, 487089), (81, 270605), (135, 162363), (405, 54121)]