20978155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{233}}^1\times {\mathrm{1637}}^1$

素因数の和:1886

約数の個数: 16

約数和(自身を含む): 27597024

約数和(自身を除く): 6618869

約数列:

[1, 5, 11, 55, 233, 1165, 1637, 2563, 8185, 12815, 18007, 90035, 381421, 1907105, 4195631, 20978155]

約数ペア:

[(1, 20978155), (5, 4195631), (11, 1907105), (55, 381421), (233, 90035), (1165, 18007), (1637, 12815), (2563, 8185)]