21881260

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{11279}}^1$

素因数の和:11385

約数の個数: 24

約数和(自身を含む): 46428480

約数和(自身を除く): 24547220

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 11279, 22558, 45116, 56395, 112790, 225580, 1094063, 2188126, 4376252, 5470315, 10940630, 21881260]

約数ペア:

[(1, 21881260), (2, 10940630), (4, 5470315), (5, 4376252), (10, 2188126), (20, 1094063), (97, 225580), (194, 112790), (388, 56395), (485, 45116), (970, 22558), (1940, 11279)]