20808670460

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{1979}}^1\times {\mathrm{1999}}^1$

素因数の和:4250

約数の個数: 48

約数和(自身を含む): 43908480000

約数和(自身を除く): 23099809540

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 1979, 1999, 2630, 3958, 3998, 5260, 7916, 7996, 9895, 9995, 19790, 19990, 39580, 39980, 520477, 525737, 1040954, 1051474, 2081908, 2102948, 2602385, 2628685, 3956021, 5204770, 5257370, 7912042, 10409540, 10514740, 15824084, 19780105, 39560210, 79120420, 1040433523, 2080867046, 4161734092, 5202167615, 10404335230, 20808670460]

約数ペア:

[(1, 20808670460), (2, 10404335230), (4, 5202167615), (5, 4161734092), (10, 2080867046), (20, 1040433523), (263, 79120420), (526, 39560210), (1052, 19780105), (1315, 15824084), (1979, 10514740), (1999, 10409540), (2630, 7912042), (3958, 5257370), (3998, 5204770), (5260, 3956021), (7916, 2628685), (7996, 2602385), (9895, 2102948), (9995, 2081908), (19790, 1051474), (19990, 1040954), (39580, 525737), (39980, 520477)]