21280755

素因数分解:

$3^1\times 5^1\times {\mathrm{127}}^1\times {\mathrm{11171}}^1$

素因数の和:11306

約数の個数: 16

約数和(自身を含む): 34320384

約数和(自身を除く): 13039629

約数列:

[1, 3, 5, 15, 127, 381, 635, 1905, 11171, 33513, 55855, 167565, 1418717, 4256151, 7093585, 21280755]

約数ペア:

[(1, 21280755), (3, 7093585), (5, 4256151), (15, 1418717), (127, 167565), (381, 55855), (635, 33513), (1905, 11171)]