20898745

素因数分解:

$5^1\times 7^2\times {\mathrm{197}}^1\times {\mathrm{433}}^1$

素因数の和:649

約数の個数: 24

約数和(自身を含む): 29388744

約数和(自身を除く): 8489999

約数列:

[1, 5, 7, 35, 49, 197, 245, 433, 985, 1379, 2165, 3031, 6895, 9653, 15155, 21217, 48265, 85301, 106085, 426505, 597107, 2985535, 4179749, 20898745]

約数ペア:

[(1, 20898745), (5, 4179749), (7, 2985535), (35, 597107), (49, 426505), (197, 106085), (245, 85301), (433, 48265), (985, 21217), (1379, 15155), (2165, 9653), (3031, 6895)]