21144739

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{149}}^1$

素因数の和:283

約数の個数: 32

約数和(自身を含む): 28224000

約数和(自身を除く): 7079261

約数列:

[1, 7, 11, 19, 77, 97, 133, 149, 209, 679, 1043, 1067, 1463, 1639, 1843, 2831, 7469, 11473, 12901, 14453, 19817, 20273, 31141, 101171, 141911, 158983, 217987, 274607, 1112881, 1922249, 3020677, 21144739]

約数ペア:

[(1, 21144739), (7, 3020677), (11, 1922249), (19, 1112881), (77, 274607), (97, 217987), (133, 158983), (149, 141911), (209, 101171), (679, 31141), (1043, 20273), (1067, 19817), (1463, 14453), (1639, 12901), (1843, 11473), (2831, 7469)]