20317780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1409}}^1$

素因数の和:1528

約数の個数: 48

約数和(自身を含む): 49271040

約数和(自身を除く): 28953260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 103, 140, 206, 412, 515, 721, 1030, 1409, 1442, 2060, 2818, 2884, 3605, 5636, 7045, 7210, 9863, 14090, 14420, 19726, 28180, 39452, 49315, 98630, 145127, 197260, 290254, 580508, 725635, 1015889, 1451270, 2031778, 2902540, 4063556, 5079445, 10158890, 20317780]

約数ペア:

[(1, 20317780), (2, 10158890), (4, 5079445), (5, 4063556), (7, 2902540), (10, 2031778), (14, 1451270), (20, 1015889), (28, 725635), (35, 580508), (70, 290254), (103, 197260), (140, 145127), (206, 98630), (412, 49315), (515, 39452), (721, 28180), (1030, 19726), (1409, 14420), (1442, 14090), (2060, 9863), (2818, 7210), (2884, 7045), (3605, 5636)]