21801820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{64123}}^1$

素因数の和:64149

約数の個数: 24

約数和(自身を含む): 48477744

約数和(自身を除く): 26675924

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 64123, 128246, 256492, 320615, 641230, 1090091, 1282460, 2180182, 4360364, 5450455, 10900910, 21801820]

約数ペア:

[(1, 21801820), (2, 10900910), (4, 5450455), (5, 4360364), (10, 2180182), (17, 1282460), (20, 1090091), (34, 641230), (68, 320615), (85, 256492), (170, 128246), (340, 64123)]