21393657

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{181}}^1\times {\mathrm{571}}^1$

素因数の和:781

約数の個数: 24

約数和(自身を含む): 32480448

約数和(自身を除く): 11086791

約数列:

[1, 3, 9, 23, 69, 181, 207, 543, 571, 1629, 1713, 4163, 5139, 12489, 13133, 37467, 39399, 103351, 118197, 310053, 930159, 2377073, 7131219, 21393657]

約数ペア:

[(1, 21393657), (3, 7131219), (9, 2377073), (23, 930159), (69, 310053), (181, 118197), (207, 103351), (543, 39399), (571, 37467), (1629, 13133), (1713, 12489), (4163, 5139)]