21855555

素因数分解:

$3^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1669}}^1$

素因数の和:1780

約数の個数: 32

約数和(自身を含む): 39278400

約数和(自身を除く): 17422845

約数列:

[1, 3, 5, 9, 15, 27, 45, 97, 135, 291, 485, 873, 1455, 1669, 2619, 4365, 5007, 8345, 13095, 15021, 25035, 45063, 75105, 161893, 225315, 485679, 809465, 1457037, 2428395, 4371111, 7285185, 21855555]

約数ペア:

[(1, 21855555), (3, 7285185), (5, 4371111), (9, 2428395), (15, 1457037), (27, 809465), (45, 485679), (97, 225315), (135, 161893), (291, 75105), (485, 45063), (873, 25035), (1455, 15021), (1669, 13095), (2619, 8345), (4365, 5007)]