20901700

素因数分解:

$2^2\times 5^2\times {\mathrm{197}}^1\times {\mathrm{1061}}^1$

素因数の和:1272

約数の個数: 36

約数和(自身を含む): 45629892

約数和(自身を除く): 24728192

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 197, 394, 788, 985, 1061, 1970, 2122, 3940, 4244, 4925, 5305, 9850, 10610, 19700, 21220, 26525, 53050, 106100, 209017, 418034, 836068, 1045085, 2090170, 4180340, 5225425, 10450850, 20901700]

約数ペア:

[(1, 20901700), (2, 10450850), (4, 5225425), (5, 4180340), (10, 2090170), (20, 1045085), (25, 836068), (50, 418034), (100, 209017), (197, 106100), (394, 53050), (788, 26525), (985, 21220), (1061, 19700), (1970, 10610), (2122, 9850), (3940, 5305), (4244, 4925)]