20502050

素因数分解:

$2^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:263

約数の個数: 48

約数和(自身を含む): 39888072

約数和(自身を除く): 19386022

約数列:

[1, 2, 5, 10, 25, 41, 50, 73, 82, 137, 146, 205, 274, 365, 410, 685, 730, 1025, 1370, 1825, 2050, 2993, 3425, 3650, 5617, 5986, 6850, 10001, 11234, 14965, 20002, 28085, 29930, 50005, 56170, 74825, 100010, 140425, 149650, 250025, 280850, 410041, 500050, 820082, 2050205, 4100410, 10251025, 20502050]

約数ペア:

[(1, 20502050), (2, 10251025), (5, 4100410), (10, 2050205), (25, 820082), (41, 500050), (50, 410041), (73, 280850), (82, 250025), (137, 149650), (146, 140425), (205, 100010), (274, 74825), (365, 56170), (410, 50005), (685, 29930), (730, 28085), (1025, 20002), (1370, 14965), (1825, 11234), (2050, 10001), (2993, 6850), (3425, 5986), (3650, 5617)]