20578100

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^2\times {\mathrm{389}}^1$

素因数の和:449

約数の個数: 54

約数和(自身を含む): 46800390

約数和(自身を除く): 26222290

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 92, 100, 115, 230, 389, 460, 529, 575, 778, 1058, 1150, 1556, 1945, 2116, 2300, 2645, 3890, 5290, 7780, 8947, 9725, 10580, 13225, 17894, 19450, 26450, 35788, 38900, 44735, 52900, 89470, 178940, 205781, 223675, 411562, 447350, 823124, 894700, 1028905, 2057810, 4115620, 5144525, 10289050, 20578100]

約数ペア:

[(1, 20578100), (2, 10289050), (4, 5144525), (5, 4115620), (10, 2057810), (20, 1028905), (23, 894700), (25, 823124), (46, 447350), (50, 411562), (92, 223675), (100, 205781), (115, 178940), (230, 89470), (389, 52900), (460, 44735), (529, 38900), (575, 35788), (778, 26450), (1058, 19450), (1150, 17894), (1556, 13225), (1945, 10580), (2116, 9725), (2300, 8947), (2645, 7780), (3890, 5290)]