21988155

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{1063}}^1$

素因数の和:1275

約数の個数: 32

約数和(自身を含む): 40449024

約数和(自身を除く): 18460869

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 197, 591, 985, 1063, 1379, 2955, 3189, 4137, 5315, 6895, 7441, 15945, 20685, 22323, 37205, 111615, 209411, 628233, 1047055, 1465877, 3141165, 4397631, 7329385, 21988155]

約数ペア:

[(1, 21988155), (3, 7329385), (5, 4397631), (7, 3141165), (15, 1465877), (21, 1047055), (35, 628233), (105, 209411), (197, 111615), (591, 37205), (985, 22323), (1063, 20685), (1379, 15945), (2955, 7441), (3189, 6895), (4137, 5315)]