21056165

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{7901}}^1$

素因数の和:7960

約数の個数: 16

約数和(自身を含む): 27878256

約数和(自身を除く): 6822091

約数列:

[1, 5, 13, 41, 65, 205, 533, 2665, 7901, 39505, 102713, 323941, 513565, 1619705, 4211233, 21056165]

約数ペア:

[(1, 21056165), (5, 4211233), (13, 1619705), (41, 513565), (65, 323941), (205, 102713), (533, 39505), (2665, 7901)]