19991825

素因数分解:

$5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1609}}^1$

素因数の和:1697

約数の個数: 24

約数和(自身を含む): 28748160

約数和(自身を除く): 8756335

約数列:

[1, 5, 7, 25, 35, 71, 175, 355, 497, 1609, 1775, 2485, 8045, 11263, 12425, 40225, 56315, 114239, 281575, 571195, 799673, 2855975, 3998365, 19991825]

約数ペア:

[(1, 19991825), (5, 3998365), (7, 2855975), (25, 799673), (35, 571195), (71, 281575), (175, 114239), (355, 56315), (497, 40225), (1609, 12425), (1775, 11263), (2485, 8045)]