21200921

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{1093}}^1$

素因数の和:1280

約数の個数: 16

約数和(自身を含む): 25835904

約数和(自身を除く): 4634983

約数列:

[1, 7, 17, 119, 163, 1093, 1141, 2771, 7651, 18581, 19397, 130067, 178159, 1247113, 3028703, 21200921]

約数ペア:

[(1, 21200921), (7, 3028703), (17, 1247113), (119, 178159), (163, 130067), (1093, 19397), (1141, 18581), (2771, 7651)]