20680760

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{5119}}^1$

素因数の和:5231

約数の個数: 32

約数和(自身を含む): 47001600

約数和(自身を除く): 26320840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 5119, 10238, 20476, 25595, 40952, 51190, 102380, 204760, 517019, 1034038, 2068076, 2585095, 4136152, 5170190, 10340380, 20680760]

約数ペア:

[(1, 20680760), (2, 10340380), (4, 5170190), (5, 4136152), (8, 2585095), (10, 2068076), (20, 1034038), (40, 517019), (101, 204760), (202, 102380), (404, 51190), (505, 40952), (808, 25595), (1010, 20476), (2020, 10238), (4040, 5119)]