21178288

素因数分解:

$2^4\times {\mathrm{197}}^1\times {\mathrm{6719}}^1$

素因数の和:6924

約数の個数: 20

約数和(自身を含む): 41247360

約数和(自身を除く): 20069072

約数列:

[1, 2, 4, 8, 16, 197, 394, 788, 1576, 3152, 6719, 13438, 26876, 53752, 107504, 1323643, 2647286, 5294572, 10589144, 21178288]

約数ペア:

[(1, 21178288), (2, 10589144), (4, 5294572), (8, 2647286), (16, 1323643), (197, 107504), (394, 53752), (788, 26876), (1576, 13438), (3152, 6719)]