20493520

素因数分解:

$2^4\times 5^1\times {\mathrm{256169}}^1$

素因数の和:256182

約数の個数: 20

約数和(自身を含む): 47647620

約数和(自身を除く): 27154100

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256169, 512338, 1024676, 1280845, 2049352, 2561690, 4098704, 5123380, 10246760, 20493520]

約数ペア:

[(1, 20493520), (2, 10246760), (4, 5123380), (5, 4098704), (8, 2561690), (10, 2049352), (16, 1280845), (20, 1024676), (40, 512338), (80, 256169)]