21491609905

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1\times {\mathrm{311}}^1\times {\mathrm{1277}}^1$

素因数の和:1809

約数の個数: 32

約数和(自身を含む): 26412272640

約数和(自身を除く): 4920662735

約数列:

[1, 5, 79, 137, 311, 395, 685, 1277, 1555, 6385, 10823, 24569, 42607, 54115, 100883, 122845, 174949, 213035, 397147, 504415, 874745, 1985735, 3365953, 13820971, 16829765, 31374613, 54409139, 69104855, 156873065, 272045695, 4298321981, 21491609905]

約数ペア:

[(1, 21491609905), (5, 4298321981), (79, 272045695), (137, 156873065), (311, 69104855), (395, 54409139), (685, 31374613), (1277, 16829765), (1555, 13820971), (6385, 3365953), (10823, 1985735), (24569, 874745), (42607, 504415), (54115, 397147), (100883, 213035), (122845, 174949)]