21505785

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{6607}}^1$

素因数の和:6653

約数の個数: 32

約数和(自身を含む): 40599552

約数和(自身を除く): 19093767

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 93, 105, 155, 217, 465, 651, 1085, 3255, 6607, 19821, 33035, 46249, 99105, 138747, 204817, 231245, 614451, 693735, 1024085, 1433719, 3072255, 4301157, 7168595, 21505785]

約数ペア:

[(1, 21505785), (3, 7168595), (5, 4301157), (7, 3072255), (15, 1433719), (21, 1024085), (31, 693735), (35, 614451), (93, 231245), (105, 204817), (155, 138747), (217, 99105), (465, 46249), (651, 33035), (1085, 19821), (3255, 6607)]