21690747

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20599}}^1$

素因数の和:20624

約数の個数: 20

約数和(自身を含む): 34896400

約数和(自身を除く): 13205653

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20599, 61797, 185391, 267787, 556173, 803361, 1668519, 2410083, 7230249, 21690747]

約数ペア:

[(1, 21690747), (3, 7230249), (9, 2410083), (13, 1668519), (27, 803361), (39, 556173), (81, 267787), (117, 185391), (351, 61797), (1053, 20599)]