21128443

素因数分解:

$7^1\times {\mathrm{29}}^2\times {\mathrm{37}}^1\times {\mathrm{97}}^1$

素因数の和:199

約数の個数: 24

約数和(自身を含む): 25948832

約数和(自身を除く): 4820389

約数列:

[1, 7, 29, 37, 97, 203, 259, 679, 841, 1073, 2813, 3589, 5887, 7511, 19691, 25123, 31117, 81577, 104081, 217819, 571039, 728567, 3018349, 21128443]

約数ペア:

[(1, 21128443), (7, 3018349), (29, 728567), (37, 571039), (97, 217819), (203, 104081), (259, 81577), (679, 31117), (841, 25123), (1073, 19691), (2813, 7511), (3589, 5887)]