20816560

素因数分解:

$2^4\times 5^1\times {\mathrm{260207}}^1$

素因数の和:260220

約数の個数: 20

約数和(自身を含む): 48398688

約数和(自身を除く): 27582128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260207, 520414, 1040828, 1301035, 2081656, 2602070, 4163312, 5204140, 10408280, 20816560]

約数ペア:

[(1, 20816560), (2, 10408280), (4, 5204140), (5, 4163312), (8, 2602070), (10, 2081656), (16, 1301035), (20, 1040828), (40, 520414), (80, 260207)]