18678875

素因数分解:

$5^3\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:200

約数の個数: 32

約数和(自身を含む): 24935040

約数和(自身を除く): 6256165

約数列:

[1, 5, 23, 25, 73, 89, 115, 125, 365, 445, 575, 1679, 1825, 2047, 2225, 2875, 6497, 8395, 9125, 10235, 11125, 32485, 41975, 51175, 149431, 162425, 209875, 255875, 747155, 812125, 3735775, 18678875]

約数ペア:

[(1, 18678875), (5, 3735775), (23, 812125), (25, 747155), (73, 255875), (89, 209875), (115, 162425), (125, 149431), (365, 51175), (445, 41975), (575, 32485), (1679, 11125), (1825, 10235), (2047, 9125), (2225, 8395), (2875, 6497)]