1220985

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{631}}^1$

素因数の和:685

約数の個数: 24

約数和(自身を含む): 2169024

約数和(自身を除く): 948039

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 631, 645, 1893, 1935, 3155, 5679, 9465, 27133, 28395, 81399, 135665, 244197, 406995, 1220985]

約数ペア:

[(1, 1220985), (3, 406995), (5, 244197), (9, 135665), (15, 81399), (43, 28395), (45, 27133), (129, 9465), (215, 5679), (387, 3155), (631, 1935), (645, 1893)]