21131994860

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{443}}^1\times {\mathrm{17159}}^1$

素因数の和:17750

約数の個数: 48

約数和(自身を含む): 44799955200

約数和(自身を除く): 23667960340

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 443, 556, 695, 886, 1390, 1772, 2215, 2780, 4430, 8860, 17159, 34318, 61577, 68636, 85795, 123154, 171590, 246308, 307885, 343180, 615770, 1231540, 2385101, 4770202, 7601437, 9540404, 11925505, 15202874, 23851010, 30405748, 38007185, 47702020, 76014370, 152028740, 1056599743, 2113199486, 4226398972, 5282998715, 10565997430, 21131994860]

約数ペア:

[(1, 21131994860), (2, 10565997430), (4, 5282998715), (5, 4226398972), (10, 2113199486), (20, 1056599743), (139, 152028740), (278, 76014370), (443, 47702020), (556, 38007185), (695, 30405748), (886, 23851010), (1390, 15202874), (1772, 11925505), (2215, 9540404), (2780, 7601437), (4430, 4770202), (8860, 2385101), (17159, 1231540), (34318, 615770), (61577, 343180), (68636, 307885), (85795, 246308), (123154, 171590)]