21662120

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2749}}^1$

素因数の和:2957

約数の個数: 32

約数和(自身を含む): 49005000

約数和(自身を除く): 27342880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2749, 3940, 5498, 7880, 10996, 13745, 21992, 27490, 54980, 109960, 541553, 1083106, 2166212, 2707765, 4332424, 5415530, 10831060, 21662120]

約数ペア:

[(1, 21662120), (2, 10831060), (4, 5415530), (5, 4332424), (8, 2707765), (10, 2166212), (20, 1083106), (40, 541553), (197, 109960), (394, 54980), (788, 27490), (985, 21992), (1576, 13745), (1970, 10996), (2749, 7880), (3940, 5498)]