19720540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20123}}^1$

素因数の和:20146

約数の個数: 36

約数和(自身を含む): 48176856

約数和(自身を除く): 28456316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20123, 40246, 80492, 100615, 140861, 201230, 281722, 402460, 563444, 704305, 986027, 1408610, 1972054, 2817220, 3944108, 4930135, 9860270, 19720540]

約数ペア:

[(1, 19720540), (2, 9860270), (4, 4930135), (5, 3944108), (7, 2817220), (10, 1972054), (14, 1408610), (20, 986027), (28, 704305), (35, 563444), (49, 402460), (70, 281722), (98, 201230), (140, 140861), (196, 100615), (245, 80492), (490, 40246), (980, 20123)]