19887755

素因数分解:

$5^1\times {\mathrm{23}}^2\times {\mathrm{73}}^1\times {\mathrm{103}}^1$

素因数の和:227

約数の個数: 24

約数和(自身を含む): 25535328

約数和(自身を除く): 5647573

約数列:

[1, 5, 23, 73, 103, 115, 365, 515, 529, 1679, 2369, 2645, 7519, 8395, 11845, 37595, 38617, 54487, 172937, 193085, 272435, 864685, 3977551, 19887755]

約数ペア:

[(1, 19887755), (5, 3977551), (23, 864685), (73, 272435), (103, 193085), (115, 172937), (365, 54487), (515, 38617), (529, 37595), (1679, 11845), (2369, 8395), (2645, 7519)]