21359205

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67807}}^1$

素因数の和:67825

約数の個数: 24

約数和(自身を含む): 42312192

約数和(自身を除く): 20952987

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 67807, 203421, 339035, 474649, 610263, 1017105, 1423947, 2373245, 3051315, 4271841, 7119735, 21359205]

約数ペア:

[(1, 21359205), (3, 7119735), (5, 4271841), (7, 3051315), (9, 2373245), (15, 1423947), (21, 1017105), (35, 610263), (45, 474649), (63, 339035), (105, 203421), (315, 67807)]