20987954

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{21817}}^1$

素因数の和:21869

約数の個数: 16

約数和(自身を含む): 34821528

約数和(自身を除く): 13833574

約数列:

[1, 2, 13, 26, 37, 74, 481, 962, 21817, 43634, 283621, 567242, 807229, 1614458, 10493977, 20987954]

約数ペア:

[(1, 20987954), (2, 10493977), (13, 1614458), (26, 807229), (37, 567242), (74, 283621), (481, 43634), (962, 21817)]