21662721

素因数分解:

$3^5\times {\mathrm{239}}^1\times {\mathrm{373}}^1$

素因数の和:627

約数の個数: 24

約数和(自身を含む): 32672640

約数和(自身を除く): 11009919

約数列:

[1, 3, 9, 27, 81, 239, 243, 373, 717, 1119, 2151, 3357, 6453, 10071, 19359, 30213, 58077, 89147, 90639, 267441, 802323, 2406969, 7220907, 21662721]

約数ペア:

[(1, 21662721), (3, 7220907), (9, 2406969), (27, 802323), (81, 267441), (239, 90639), (243, 89147), (373, 58077), (717, 30213), (1119, 19359), (2151, 10071), (3357, 6453)]