21127720

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{4159}}^1$

素因数の和:4297

約数の個数: 32

約数和(自身を含む): 47923200

約数和(自身を除く): 26795480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 4159, 5080, 8318, 16636, 20795, 33272, 41590, 83180, 166360, 528193, 1056386, 2112772, 2640965, 4225544, 5281930, 10563860, 21127720]

約数ペア:

[(1, 21127720), (2, 10563860), (4, 5281930), (5, 4225544), (8, 2640965), (10, 2112772), (20, 1056386), (40, 528193), (127, 166360), (254, 83180), (508, 41590), (635, 33272), (1016, 20795), (1270, 16636), (2540, 8318), (4159, 5080)]