21199755

素因数分解:

$3^1\times 5^1\times {\mathrm{367}}^1\times {\mathrm{3851}}^1$

素因数の和:4226

約数の個数: 16

約数和(自身を含む): 34020864

約数和(自身を除く): 12821109

約数列:

[1, 3, 5, 15, 367, 1101, 1835, 3851, 5505, 11553, 19255, 57765, 1413317, 4239951, 7066585, 21199755]

約数ペア:

[(1, 21199755), (3, 7066585), (5, 4239951), (15, 1413317), (367, 57765), (1101, 19255), (1835, 11553), (3851, 5505)]