20504805

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{421}}^1$

素因数の和:637

約数の個数: 32

約数和(自身を含む): 35002368

約数和(自身を除く): 14497563

約数列:

[1, 3, 5, 15, 17, 51, 85, 191, 255, 421, 573, 955, 1263, 2105, 2865, 3247, 6315, 7157, 9741, 16235, 21471, 35785, 48705, 80411, 107355, 241233, 402055, 1206165, 1366987, 4100961, 6834935, 20504805]

約数ペア:

[(1, 20504805), (3, 6834935), (5, 4100961), (15, 1366987), (17, 1206165), (51, 402055), (85, 241233), (191, 107355), (255, 80411), (421, 48705), (573, 35785), (955, 21471), (1263, 16235), (2105, 9741), (2865, 7157), (3247, 6315)]