21180496

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{24977}}^1$

素因数の和:25038

約数の個数: 20

約数和(自身を含む): 41813172

約数和(自身を除く): 20632676

約数列:

[1, 2, 4, 8, 16, 53, 106, 212, 424, 848, 24977, 49954, 99908, 199816, 399632, 1323781, 2647562, 5295124, 10590248, 21180496]

約数ペア:

[(1, 21180496), (2, 10590248), (4, 5295124), (8, 2647562), (16, 1323781), (53, 399632), (106, 199816), (212, 99908), (424, 49954), (848, 24977)]