19901252

素因数分解:

$2^2\times 7^2\times {\mathrm{101537}}^1$

素因数の和:101555

約数の個数: 18

約数和(自身を含む): 40513662

約数和(自身を除く): 20612410

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 101537, 203074, 406148, 710759, 1421518, 2843036, 4975313, 9950626, 19901252]

約数ペア:

[(1, 19901252), (2, 9950626), (4, 4975313), (7, 2843036), (14, 1421518), (28, 710759), (49, 406148), (98, 203074), (196, 101537)]