21662389

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{157}}^1\times {\mathrm{857}}^1$

素因数の和:1044

約数の個数: 16

約数和(自身を含む): 26028288

約数和(自身を除く): 4365899

約数列:

[1, 7, 23, 157, 161, 857, 1099, 3611, 5999, 19711, 25277, 134549, 137977, 941843, 3094627, 21662389]

約数ペア:

[(1, 21662389), (7, 3094627), (23, 941843), (157, 137977), (161, 134549), (857, 25277), (1099, 19711), (3611, 5999)]