18129500

素因数分解:

$2^2\times 5^3\times {\mathrm{101}}^1\times {\mathrm{359}}^1$

素因数の和:479

約数の個数: 48

約数和(自身を含む): 40098240

約数和(自身を除く): 21968740

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 101, 125, 202, 250, 359, 404, 500, 505, 718, 1010, 1436, 1795, 2020, 2525, 3590, 5050, 7180, 8975, 10100, 12625, 17950, 25250, 35900, 36259, 44875, 50500, 72518, 89750, 145036, 179500, 181295, 362590, 725180, 906475, 1812950, 3625900, 4532375, 9064750, 18129500]

約数ペア:

[(1, 18129500), (2, 9064750), (4, 4532375), (5, 3625900), (10, 1812950), (20, 906475), (25, 725180), (50, 362590), (100, 181295), (101, 179500), (125, 145036), (202, 89750), (250, 72518), (359, 50500), (404, 44875), (500, 36259), (505, 35900), (718, 25250), (1010, 17950), (1436, 12625), (1795, 10100), (2020, 8975), (2525, 7180), (3590, 5050)]