19906840

素因数分解:

$2^3\times 5^1\times {\mathrm{497671}}^1$

素因数の和:497682

約数の個数: 16

約数和(自身を含む): 44790480

約数和(自身を除く): 24883640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497671, 995342, 1990684, 2488355, 3981368, 4976710, 9953420, 19906840]

約数ペア:

[(1, 19906840), (2, 9953420), (4, 4976710), (5, 3981368), (8, 2488355), (10, 1990684), (20, 995342), (40, 497671)]