21151215

素因数分解:

$3^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{3701}}^1$

素因数の和:3839

約数の個数: 24

約数和(自身を含む): 36960768

約数和(自身を除く): 15809553

約数列:

[1, 3, 5, 9, 15, 45, 127, 381, 635, 1143, 1905, 3701, 5715, 11103, 18505, 33309, 55515, 166545, 470027, 1410081, 2350135, 4230243, 7050405, 21151215]

約数ペア:

[(1, 21151215), (3, 7050405), (5, 4230243), (9, 2350135), (15, 1410081), (45, 470027), (127, 166545), (381, 55515), (635, 33309), (1143, 18505), (1905, 11103), (3701, 5715)]