21039915

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107897}}^1$

素因数の和:107918

約数の個数: 16

約数和(自身を含む): 36253728

約数和(自身を除く): 15213813

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 107897, 323691, 539485, 1402661, 1618455, 4207983, 7013305, 21039915]

約数ペア:

[(1, 21039915), (3, 7013305), (5, 4207983), (13, 1618455), (15, 1402661), (39, 539485), (65, 323691), (195, 107897)]