21406995

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{27983}}^1$

素因数の和:28011

約数の個数: 24

約数和(自身を含む): 39289536

約数和(自身を除く): 17882541

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 27983, 83949, 139915, 251847, 419745, 475711, 1259235, 1427133, 2378555, 4281399, 7135665, 21406995]

約数ペア:

[(1, 21406995), (3, 7135665), (5, 4281399), (9, 2378555), (15, 1427133), (17, 1259235), (45, 475711), (51, 419745), (85, 251847), (153, 139915), (255, 83949), (765, 27983)]