21317445

素因数分解:

$3^3\times 5^1\times {\mathrm{157907}}^1$

素因数の和:157921

約数の個数: 16

約数和(自身を含む): 37897920

約数和(自身を除く): 16580475

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157907, 473721, 789535, 1421163, 2368605, 4263489, 7105815, 21317445]

約数ペア:

[(1, 21317445), (3, 7105815), (5, 4263489), (9, 2368605), (15, 1421163), (27, 789535), (45, 473721), (135, 157907)]