21183820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{337}}^1\times {\mathrm{449}}^1$

素因数の和:802

約数の個数: 48

約数和(自身を含む): 51105600

約数和(自身を除く): 29921780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 337, 449, 674, 898, 1348, 1685, 1796, 2245, 2359, 3143, 3370, 4490, 4718, 6286, 6740, 8980, 9436, 11795, 12572, 15715, 23590, 31430, 47180, 62860, 151313, 302626, 605252, 756565, 1059191, 1513130, 2118382, 3026260, 4236764, 5295955, 10591910, 21183820]

約数ペア:

[(1, 21183820), (2, 10591910), (4, 5295955), (5, 4236764), (7, 3026260), (10, 2118382), (14, 1513130), (20, 1059191), (28, 756565), (35, 605252), (70, 302626), (140, 151313), (337, 62860), (449, 47180), (674, 31430), (898, 23590), (1348, 15715), (1685, 12572), (1796, 11795), (2245, 9436), (2359, 8980), (3143, 6740), (3370, 6286), (4490, 4718)]