21500985

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{311}}^1\times {\mathrm{419}}^1$

素因数の和:749

約数の個数: 32

約数和(自身を含む): 37739520

約数和(自身を除く): 16238535

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 311, 419, 933, 1257, 1555, 2095, 3421, 4609, 4665, 6285, 10263, 13827, 17105, 23045, 51315, 69135, 130309, 390927, 651545, 1433399, 1954635, 4300197, 7166995, 21500985]

約数ペア:

[(1, 21500985), (3, 7166995), (5, 4300197), (11, 1954635), (15, 1433399), (33, 651545), (55, 390927), (165, 130309), (311, 69135), (419, 51315), (933, 23045), (1257, 17105), (1555, 13827), (2095, 10263), (3421, 6285), (4609, 4665)]