20405847

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{88337}}^1$

素因数の和:88358

約数の個数: 16

約数和(自身を含む): 33921792

約数和(自身を除く): 13515945

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 88337, 265011, 618359, 971707, 1855077, 2915121, 6801949, 20405847]

約数ペア:

[(1, 20405847), (3, 6801949), (7, 2915121), (11, 1855077), (21, 971707), (33, 618359), (77, 265011), (231, 88337)]