21105775

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{349}}^1$

素因数の和:459

約数の個数: 24

約数和(自身を含む): 27342000

約数和(自身を除く): 6236225

約数列:

[1, 5, 25, 41, 59, 205, 295, 349, 1025, 1475, 1745, 2419, 8725, 12095, 14309, 20591, 60475, 71545, 102955, 357725, 514775, 844231, 4221155, 21105775]

約数ペア:

[(1, 21105775), (5, 4221155), (25, 844231), (41, 514775), (59, 357725), (205, 102955), (295, 71545), (349, 60475), (1025, 20591), (1475, 14309), (1745, 12095), (2419, 8725)]