20404880

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6221}}^1$

素因数の和:6275

約数の個数: 40

約数和(自身を含む): 48606264

約数和(自身を除く): 28201384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6221, 12442, 24884, 31105, 49768, 62210, 99536, 124420, 248840, 255061, 497680, 510122, 1020244, 1275305, 2040488, 2550610, 4080976, 5101220, 10202440, 20404880]

約数ペア:

[(1, 20404880), (2, 10202440), (4, 5101220), (5, 4080976), (8, 2550610), (10, 2040488), (16, 1275305), (20, 1020244), (40, 510122), (41, 497680), (80, 255061), (82, 248840), (164, 124420), (205, 99536), (328, 62210), (410, 49768), (656, 31105), (820, 24884), (1640, 12442), (3280, 6221)]