18824991

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{1481}}^1$

素因数の和:1726

約数の個数: 16

約数和(自身を含む): 26557440

約数和(自身を除く): 7732449

約数列:

[1, 3, 19, 57, 223, 669, 1481, 4237, 4443, 12711, 28139, 84417, 330263, 990789, 6274997, 18824991]

約数ペア:

[(1, 18824991), (3, 6274997), (19, 990789), (57, 330263), (223, 84417), (669, 28139), (1481, 12711), (4237, 4443)]