28120180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127819}}^1$

素因数の和:127839

約数の個数: 24

約数和(自身を含む): 64421280

約数和(自身を除く): 36301100

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 127819, 255638, 511276, 639095, 1278190, 1406009, 2556380, 2812018, 5624036, 7030045, 14060090, 28120180]

約数ペア:

[(1, 28120180), (2, 14060090), (4, 7030045), (5, 5624036), (10, 2812018), (11, 2556380), (20, 1406009), (22, 1278190), (44, 639095), (55, 511276), (110, 255638), (220, 127819)]