20989215

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{35879}}^1$

素因数の和:35903

約数の個数: 24

約数和(自身を含む): 39180960

約数和(自身を除く): 18191745

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 35879, 107637, 179395, 322911, 466427, 538185, 1399281, 1614555, 2332135, 4197843, 6996405, 20989215]

約数ペア:

[(1, 20989215), (3, 6996405), (5, 4197843), (9, 2332135), (13, 1614555), (15, 1399281), (39, 538185), (45, 466427), (65, 322911), (117, 179395), (195, 107637), (585, 35879)]