20989203

素因数分解:

$3^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{563}}^1$

素因数の和:643

約数の個数: 24

約数和(自身を含む): 30474048

約数和(自身を除く): 9484845

約数列:

[1, 3, 17, 43, 51, 129, 289, 563, 731, 867, 1689, 2193, 9571, 12427, 24209, 28713, 37281, 72627, 162707, 411553, 488121, 1234659, 6996401, 20989203]

約数ペア:

[(1, 20989203), (3, 6996401), (17, 1234659), (43, 488121), (51, 411553), (129, 162707), (289, 72627), (563, 37281), (731, 28713), (867, 24209), (1689, 12427), (2193, 9571)]