51285680

素因数分解:

$2^4\times 5^1\times {\mathrm{643}}^1\times {\mathrm{997}}^1$

素因数の和:1653

約数の個数: 40

約数和(自身を含む): 119544432

約数和(自身を除く): 68258752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 643, 997, 1286, 1994, 2572, 3215, 3988, 4985, 5144, 6430, 7976, 9970, 10288, 12860, 15952, 19940, 25720, 39880, 51440, 79760, 641071, 1282142, 2564284, 3205355, 5128568, 6410710, 10257136, 12821420, 25642840, 51285680]

約数ペア:

[(1, 51285680), (2, 25642840), (4, 12821420), (5, 10257136), (8, 6410710), (10, 5128568), (16, 3205355), (20, 2564284), (40, 1282142), (80, 641071), (643, 79760), (997, 51440), (1286, 39880), (1994, 25720), (2572, 19940), (3215, 15952), (3988, 12860), (4985, 10288), (5144, 9970), (6430, 7976)]