20485520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23279}}^1$

素因数の和:23303

約数の個数: 40

約数和(自身を含む): 51960960

約数和(自身を除く): 31475440

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23279, 46558, 93116, 116395, 186232, 232790, 256069, 372464, 465580, 512138, 931160, 1024276, 1280345, 1862320, 2048552, 2560690, 4097104, 5121380, 10242760, 20485520]

約数ペア:

[(1, 20485520), (2, 10242760), (4, 5121380), (5, 4097104), (8, 2560690), (10, 2048552), (11, 1862320), (16, 1280345), (20, 1024276), (22, 931160), (40, 512138), (44, 465580), (55, 372464), (80, 256069), (88, 232790), (110, 186232), (176, 116395), (220, 93116), (440, 46558), (880, 23279)]