19982975

素因数分解:

$5^2\times {\mathrm{23}}^2\times {\mathrm{1511}}^1$

素因数の和:1567

約数の個数: 18

約数和(自身を含む): 25920216

約数和(自身を除く): 5937241

約数列:

[1, 5, 23, 25, 115, 529, 575, 1511, 2645, 7555, 13225, 34753, 37775, 173765, 799319, 868825, 3996595, 19982975]

約数ペア:

[(1, 19982975), (5, 3996595), (23, 868825), (25, 799319), (115, 173765), (529, 37775), (575, 34753), (1511, 13225), (2645, 7555)]