21118719

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{5281}}^1$

素因数の和:5358

約数の個数: 16

約数和(自身を含む): 29748224

約数和(自身を除く): 8629505

約数列:

[1, 3, 31, 43, 93, 129, 1333, 3999, 5281, 15843, 163711, 227083, 491133, 681249, 7039573, 21118719]

約数ペア:

[(1, 21118719), (3, 7039573), (31, 681249), (43, 491133), (93, 227083), (129, 163711), (1333, 15843), (3999, 5281)]