21305565

素因数分解:

$3^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{1627}}^1$

素因数の和:1738

約数の個数: 32

約数和(自身を含む): 38290560

約数和(自身を除く): 16984995

約数列:

[1, 3, 5, 9, 15, 27, 45, 97, 135, 291, 485, 873, 1455, 1627, 2619, 4365, 4881, 8135, 13095, 14643, 24405, 43929, 73215, 157819, 219645, 473457, 789095, 1420371, 2367285, 4261113, 7101855, 21305565]

約数ペア:

[(1, 21305565), (3, 7101855), (5, 4261113), (9, 2367285), (15, 1420371), (27, 789095), (45, 473457), (97, 219645), (135, 157819), (291, 73215), (485, 43929), (873, 24405), (1455, 14643), (1627, 13095), (2619, 8135), (4365, 4881)]