20910591

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{571}}^1$

素因数の和:903

約数の個数: 24

約数和(自身を含む): 32688656

約数和(自身を除く): 11778065

約数列:

[1, 3, 9, 13, 39, 117, 313, 571, 939, 1713, 2817, 4069, 5139, 7423, 12207, 22269, 36621, 66807, 178723, 536169, 1608507, 2323399, 6970197, 20910591]

約数ペア:

[(1, 20910591), (3, 6970197), (9, 2323399), (13, 1608507), (39, 536169), (117, 178723), (313, 66807), (571, 36621), (939, 22269), (1713, 12207), (2817, 7423), (4069, 5139)]