19721828

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{22721}}^1$

素因数の和:22763

約数の個数: 24

約数和(自身を含む): 40717824

約数和(自身を除く): 20995996

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 217, 434, 868, 22721, 45442, 90884, 159047, 318094, 636188, 704351, 1408702, 2817404, 4930457, 9860914, 19721828]

約数ペア:

[(1, 19721828), (2, 9860914), (4, 4930457), (7, 2817404), (14, 1408702), (28, 704351), (31, 636188), (62, 318094), (124, 159047), (217, 90884), (434, 45442), (868, 22721)]