21489945

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{421}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 35731584

約数和(自身を除く): 14241639

約数列:

[1, 3, 5, 15, 41, 83, 123, 205, 249, 415, 421, 615, 1245, 1263, 2105, 3403, 6315, 10209, 17015, 17261, 34943, 51045, 51783, 86305, 104829, 174715, 258915, 524145, 1432663, 4297989, 7163315, 21489945]

約数ペア:

[(1, 21489945), (3, 7163315), (5, 4297989), (15, 1432663), (41, 524145), (83, 258915), (123, 174715), (205, 104829), (249, 86305), (415, 51783), (421, 51045), (615, 34943), (1245, 17261), (1263, 17015), (2105, 10209), (3403, 6315)]