199944880

素因数分解:

$2^4\times 5^1\times {\mathrm{2499311}}^1$

素因数の和:2499324

約数の個数: 20

約数和(自身を含む): 464872032

約数和(自身を除く): 264927152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2499311, 4998622, 9997244, 12496555, 19994488, 24993110, 39988976, 49986220, 99972440, 199944880]

約数ペア:

[(1, 199944880), (2, 99972440), (4, 49986220), (5, 39988976), (8, 24993110), (10, 19994488), (16, 12496555), (20, 9997244), (40, 4998622), (80, 2499311)]