21155445

素因数分解:

$3^3\times 5^1\times {\mathrm{156707}}^1$

素因数の和:156721

約数の個数: 16

約数和(自身を含む): 37609920

約数和(自身を除く): 16454475

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 156707, 470121, 783535, 1410363, 2350605, 4231089, 7051815, 21155445]

約数ペア:

[(1, 21155445), (3, 7051815), (5, 4231089), (9, 2350605), (15, 1410363), (27, 783535), (45, 470121), (135, 156707)]