19710691

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:164

約数の個数: 48

約数和(自身を含む): 28153440

約数和(自身を除く): 8442749

約数列:

[1, 7, 11, 13, 29, 49, 77, 91, 97, 143, 203, 319, 377, 539, 637, 679, 1001, 1067, 1261, 1421, 2233, 2639, 2813, 4147, 4753, 7007, 7469, 8827, 13871, 15631, 18473, 19691, 29029, 30943, 36569, 52283, 61789, 97097, 137837, 203203, 216601, 255983, 402259, 679679, 1516207, 1791881, 2815813, 19710691]

約数ペア:

[(1, 19710691), (7, 2815813), (11, 1791881), (13, 1516207), (29, 679679), (49, 402259), (77, 255983), (91, 216601), (97, 203203), (143, 137837), (203, 97097), (319, 61789), (377, 52283), (539, 36569), (637, 30943), (679, 29029), (1001, 19691), (1067, 18473), (1261, 15631), (1421, 13871), (2233, 8827), (2639, 7469), (2813, 7007), (4147, 4753)]