20975600

素因数分解:

$2^4\times 5^2\times {\mathrm{41}}^1\times {\mathrm{1279}}^1$

素因数の和:1338

約数の個数: 60

約数和(自身を含む): 51663360

約数和(自身を除く): 30687760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 41, 50, 80, 82, 100, 164, 200, 205, 328, 400, 410, 656, 820, 1025, 1279, 1640, 2050, 2558, 3280, 4100, 5116, 6395, 8200, 10232, 12790, 16400, 20464, 25580, 31975, 51160, 52439, 63950, 102320, 104878, 127900, 209756, 255800, 262195, 419512, 511600, 524390, 839024, 1048780, 1310975, 2097560, 2621950, 4195120, 5243900, 10487800, 20975600]

約数ペア:

[(1, 20975600), (2, 10487800), (4, 5243900), (5, 4195120), (8, 2621950), (10, 2097560), (16, 1310975), (20, 1048780), (25, 839024), (40, 524390), (41, 511600), (50, 419512), (80, 262195), (82, 255800), (100, 209756), (164, 127900), (200, 104878), (205, 102320), (328, 63950), (400, 52439), (410, 51160), (656, 31975), (820, 25580), (1025, 20464), (1279, 16400), (1640, 12790), (2050, 10232), (2558, 8200), (3280, 6395), (4100, 5116)]