12800020

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{761}}^1$

素因数の和:828

約数の個数: 36

約数和(自身を含む): 27875484

約数和(自身を除く): 15075464

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 761, 841, 1522, 1682, 3044, 3364, 3805, 4205, 7610, 8410, 15220, 16820, 22069, 44138, 88276, 110345, 220690, 441380, 640001, 1280002, 2560004, 3200005, 6400010, 12800020]

約数ペア:

[(1, 12800020), (2, 6400010), (4, 3200005), (5, 2560004), (10, 1280002), (20, 640001), (29, 441380), (58, 220690), (116, 110345), (145, 88276), (290, 44138), (580, 22069), (761, 16820), (841, 15220), (1522, 8410), (1682, 7610), (3044, 4205), (3364, 3805)]