21900131

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{83}}^2$

素因数の和:211

約数の個数: 18

約数和(自身を含む): 25688532

約数和(自身を除く): 3788401

約数列:

[1, 11, 17, 83, 187, 289, 913, 1411, 3179, 6889, 15521, 23987, 75779, 117113, 263857, 1288243, 1990921, 21900131]

約数ペア:

[(1, 21900131), (11, 1990921), (17, 1288243), (83, 263857), (187, 117113), (289, 75779), (913, 23987), (1411, 15521), (3179, 6889)]