20181028880

素因数分解:

$2^4\times 5^1\times {\mathrm{19937}}^1\times {\mathrm{12653}}^1$

素因数の和:32603

約数の個数: 40

約数和(自身を含む): 46926954072

約数和(自身を除く): 26745925192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 12653, 19937, 25306, 39874, 50612, 63265, 79748, 99685, 101224, 126530, 159496, 199370, 202448, 253060, 318992, 398740, 506120, 797480, 1012240, 1594960, 252262861, 504525722, 1009051444, 1261314305, 2018102888, 2522628610, 4036205776, 5045257220, 10090514440, 20181028880]

約数ペア:

[(1, 20181028880), (2, 10090514440), (4, 5045257220), (5, 4036205776), (8, 2522628610), (10, 2018102888), (16, 1261314305), (20, 1009051444), (40, 504525722), (80, 252262861), (12653, 1594960), (19937, 1012240), (25306, 797480), (39874, 506120), (50612, 398740), (63265, 318992), (79748, 253060), (99685, 202448), (101224, 199370), (126530, 159496)]