20721915575

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{2281}}^1\times {\mathrm{8863}}^1$

素因数の和:11195

約数の個数: 24

約数和(自身を含む): 26336397696

約数和(自身を除く): 5614482121

約数列:

[1, 5, 25, 41, 205, 1025, 2281, 8863, 11405, 44315, 57025, 93521, 221575, 363383, 467605, 1816915, 2338025, 9084575, 20216503, 101082515, 505412575, 828876623, 4144383115, 20721915575]

約数ペア:

[(1, 20721915575), (5, 4144383115), (25, 828876623), (41, 505412575), (205, 101082515), (1025, 20216503), (2281, 9084575), (8863, 2338025), (11405, 1816915), (44315, 467605), (57025, 363383), (93521, 221575)]