19986561

素因数分解:

$3^3\times 7^2\times {\mathrm{15107}}^1$

素因数の和:15130

約数の個数: 24

約数和(自身を含む): 34446240

約数和(自身を除く): 14459679

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 15107, 45321, 105749, 135963, 317247, 407889, 740243, 951741, 2220729, 2855223, 6662187, 19986561]

約数ペア:

[(1, 19986561), (3, 6662187), (7, 2855223), (9, 2220729), (21, 951741), (27, 740243), (49, 407889), (63, 317247), (147, 135963), (189, 105749), (441, 45321), (1323, 15107)]