20419760

素因数分解:

$2^4\times 5^1\times {\mathrm{255247}}^1$

素因数の和:255260

約数の個数: 20

約数和(自身を含む): 47476128

約数和(自身を除く): 27056368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255247, 510494, 1020988, 1276235, 2041976, 2552470, 4083952, 5104940, 10209880, 20419760]

約数ペア:

[(1, 20419760), (2, 10209880), (4, 5104940), (5, 4083952), (8, 2552470), (10, 2041976), (16, 1276235), (20, 1020988), (40, 510494), (80, 255247)]