21856285

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{193}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 30170880

約数和(自身を除く): 8314595

約数列:

[1, 5, 11, 29, 55, 71, 145, 193, 319, 355, 781, 965, 1595, 2059, 2123, 3905, 5597, 10295, 10615, 13703, 22649, 27985, 61567, 68515, 113245, 150733, 307835, 397387, 753665, 1986935, 4371257, 21856285]

約数ペア:

[(1, 21856285), (5, 4371257), (11, 1986935), (29, 753665), (55, 397387), (71, 307835), (145, 150733), (193, 113245), (319, 68515), (355, 61567), (781, 27985), (965, 22649), (1595, 13703), (2059, 10615), (2123, 10295), (3905, 5597)]