64792240

素因数分解:

$2^4\times 5^1\times {\mathrm{809903}}^1$

素因数の和:809916

約数の個数: 20

約数和(自身を含む): 150642144

約数和(自身を除く): 85849904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 809903, 1619806, 3239612, 4049515, 6479224, 8099030, 12958448, 16198060, 32396120, 64792240]

約数ペア:

[(1, 64792240), (2, 32396120), (4, 16198060), (5, 12958448), (8, 8099030), (10, 6479224), (16, 4049515), (20, 3239612), (40, 1619806), (80, 809903)]