21209985

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{8269}}^1$

素因数の和:8302

約数の個数: 32

約数和(自身を含む): 39696000

約数和(自身を除く): 18486015

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 513, 855, 2565, 8269, 24807, 41345, 74421, 124035, 157111, 223263, 372105, 471333, 785555, 1116315, 1413999, 2356665, 4241997, 7069995, 21209985]

約数ペア:

[(1, 21209985), (3, 7069995), (5, 4241997), (9, 2356665), (15, 1413999), (19, 1116315), (27, 785555), (45, 471333), (57, 372105), (95, 223263), (135, 157111), (171, 124035), (285, 74421), (513, 41345), (855, 24807), (2565, 8269)]