20894420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{307}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 45638208

約数和(自身を除く): 24743788

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 83, 164, 166, 205, 307, 332, 410, 415, 614, 820, 830, 1228, 1535, 1660, 3070, 3403, 6140, 6806, 12587, 13612, 17015, 25174, 25481, 34030, 50348, 50962, 62935, 68060, 101924, 125870, 127405, 251740, 254810, 509620, 1044721, 2089442, 4178884, 5223605, 10447210, 20894420]

約数ペア:

[(1, 20894420), (2, 10447210), (4, 5223605), (5, 4178884), (10, 2089442), (20, 1044721), (41, 509620), (82, 254810), (83, 251740), (164, 127405), (166, 125870), (205, 101924), (307, 68060), (332, 62935), (410, 50962), (415, 50348), (614, 34030), (820, 25481), (830, 25174), (1228, 17015), (1535, 13612), (1660, 12587), (3070, 6806), (3403, 6140)]