21095555

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{1123}}^1$

素因数の和:1175

約数の個数: 24

約数和(自身を含む): 28985712

約数和(自身を除く): 7890157

約数列:

[1, 5, 13, 17, 65, 85, 221, 289, 1105, 1123, 1445, 3757, 5615, 14599, 18785, 19091, 72995, 95455, 248183, 324547, 1240915, 1622735, 4219111, 21095555]

約数ペア:

[(1, 21095555), (5, 4219111), (13, 1622735), (17, 1240915), (65, 324547), (85, 248183), (221, 95455), (289, 72995), (1105, 19091), (1123, 18785), (1445, 14599), (3757, 5615)]