21257895

素因数分解:

$3^1\times 5^1\times {\mathrm{127}}^1\times {\mathrm{11159}}^1$

素因数の和:11294

約数の個数: 16

約数和(自身を含む): 34283520

約数和(自身を除く): 13025625

約数列:

[1, 3, 5, 15, 127, 381, 635, 1905, 11159, 33477, 55795, 167385, 1417193, 4251579, 7085965, 21257895]

約数ペア:

[(1, 21257895), (3, 7085965), (5, 4251579), (15, 1417193), (127, 167385), (381, 55795), (635, 33477), (1905, 11159)]