20815820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61223}}^1$

素因数の和:61249

約数の個数: 24

約数和(自身を含む): 46285344

約数和(自身を除く): 25469524

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61223, 122446, 244892, 306115, 612230, 1040791, 1224460, 2081582, 4163164, 5203955, 10407910, 20815820]

約数ペア:

[(1, 20815820), (2, 10407910), (4, 5203955), (5, 4163164), (10, 2081582), (17, 1224460), (20, 1040791), (34, 612230), (68, 306115), (85, 244892), (170, 122446), (340, 61223)]