19959535

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{109}}^1\times {\mathrm{691}}^1$

素因数の和:858

約数の個数: 16

約数和(自身を含む): 24662880

約数和(自身を除く): 4703345

約数列:

[1, 5, 53, 109, 265, 545, 691, 3455, 5777, 28885, 36623, 75319, 183115, 376595, 3991907, 19959535]

約数ペア:

[(1, 19959535), (5, 3991907), (53, 376595), (109, 183115), (265, 75319), (545, 36623), (691, 28885), (3455, 5777)]