21080765

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{263}}^1$

素因数の和:349

約数の個数: 32

約数和(自身を含む): 28740096

約数和(自身を除く): 7659331

約数列:

[1, 5, 17, 23, 41, 85, 115, 205, 263, 391, 697, 943, 1315, 1955, 3485, 4471, 4715, 6049, 10783, 16031, 22355, 30245, 53915, 80155, 102833, 183311, 248009, 514165, 916555, 1240045, 4216153, 21080765]

約数ペア:

[(1, 21080765), (5, 4216153), (17, 1240045), (23, 916555), (41, 514165), (85, 248009), (115, 183311), (205, 102833), (263, 80155), (391, 53915), (697, 30245), (943, 22355), (1315, 16031), (1955, 10783), (3485, 6049), (4471, 4715)]