20997963

素因数分解:

$3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{4219}}^1$

素因数の和:4311

約数の個数: 24

約数和(自身を含む): 35110400

約数和(自身を除く): 14112437

約数列:

[1, 3, 7, 9, 21, 63, 79, 237, 553, 711, 1659, 4219, 4977, 12657, 29533, 37971, 88599, 265797, 333301, 999903, 2333107, 2999709, 6999321, 20997963]

約数ペア:

[(1, 20997963), (3, 6999321), (7, 2999709), (9, 2333107), (21, 999903), (63, 333301), (79, 265797), (237, 88599), (553, 37971), (711, 29533), (1659, 12657), (4219, 4977)]