19745089

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{223}}^1$

素因数の和:389

約数の個数: 24

約数和(自身を含む): 25025280

約数和(自身を除く): 5280191

約数列:

[1, 7, 13, 49, 91, 139, 223, 637, 973, 1561, 1807, 2899, 6811, 10927, 12649, 20293, 30997, 88543, 142051, 216979, 402961, 1518853, 2820727, 19745089]

約数ペア:

[(1, 19745089), (7, 2820727), (13, 1518853), (49, 402961), (91, 216979), (139, 142051), (223, 88543), (637, 30997), (973, 20293), (1561, 12649), (1807, 10927), (2899, 6811)]