21047685

素因数分解:

$3^1\times 5^1\times {\mathrm{313}}^1\times {\mathrm{4483}}^1$

素因数の和:4804

約数の個数: 16

約数和(自身を含む): 33791424

約数和(自身を除く): 12743739

約数列:

[1, 3, 5, 15, 313, 939, 1565, 4483, 4695, 13449, 22415, 67245, 1403179, 4209537, 7015895, 21047685]

約数ペア:

[(1, 21047685), (3, 7015895), (5, 4209537), (15, 1403179), (313, 67245), (939, 22415), (1565, 13449), (4483, 4695)]