21388972

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{4813}}^1$

素因数の和:4929

約数の個数: 24

約数和(自身を含む): 41246352

約数和(自身を除く): 19857380

約数列:

[1, 2, 4, 11, 22, 44, 101, 202, 404, 1111, 2222, 4444, 4813, 9626, 19252, 52943, 105886, 211772, 486113, 972226, 1944452, 5347243, 10694486, 21388972]

約数ペア:

[(1, 21388972), (2, 10694486), (4, 5347243), (11, 1944452), (22, 972226), (44, 486113), (101, 211772), (202, 105886), (404, 52943), (1111, 19252), (2222, 9626), (4444, 4813)]