19986421

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{4673}}^1$

素因数の和:4740

約数の個数: 16

約数和(自身を含む): 25127424

約数和(自身を除く): 5141003

約数列:

[1, 7, 13, 47, 91, 329, 611, 4277, 4673, 32711, 60749, 219631, 425243, 1537417, 2855203, 19986421]

約数ペア:

[(1, 19986421), (7, 2855203), (13, 1537417), (47, 425243), (91, 219631), (329, 60749), (611, 32711), (4277, 4673)]