81338740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{487}}^1\times {\mathrm{1193}}^1$

素因数の和:1696

約数の個数: 48

約数和(自身を含む): 195777792

約数和(自身を除く): 114439052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 487, 974, 1193, 1948, 2386, 2435, 3409, 4772, 4870, 5965, 6818, 8351, 9740, 11930, 13636, 16702, 17045, 23860, 33404, 34090, 41755, 68180, 83510, 167020, 580991, 1161982, 2323964, 2904955, 4066937, 5809910, 8133874, 11619820, 16267748, 20334685, 40669370, 81338740]

約数ペア:

[(1, 81338740), (2, 40669370), (4, 20334685), (5, 16267748), (7, 11619820), (10, 8133874), (14, 5809910), (20, 4066937), (28, 2904955), (35, 2323964), (70, 1161982), (140, 580991), (487, 167020), (974, 83510), (1193, 68180), (1948, 41755), (2386, 34090), (2435, 33404), (3409, 23860), (4772, 17045), (4870, 16702), (5965, 13636), (6818, 11930), (8351, 9740)]