21020783469

素因数分解:

$3^1\times 7^3\times {\mathrm{101}}^1\times {\mathrm{223}}^1\times {\mathrm{907}}^1$

素因数の和:1255

約数の個数: 64

約数和(自身を含む): 33193574400

約数和(自身を除く): 12172790931

約数列:

[1, 3, 7, 21, 49, 101, 147, 223, 303, 343, 669, 707, 907, 1029, 1561, 2121, 2721, 4683, 4949, 6349, 10927, 14847, 19047, 22523, 32781, 34643, 44443, 67569, 76489, 91607, 103929, 133329, 157661, 202261, 229467, 274821, 311101, 472983, 606783, 641249, 933303, 1103627, 1415827, 1923747, 3310881, 4247481, 4488743, 7725389, 9910789, 13466229, 20428361, 23176167, 29732367, 31421201, 61285083, 69375523, 94263603, 142998527, 208126569, 428995581, 1000989689, 3002969067, 7006927823, 21020783469]

約数ペア:

[(1, 21020783469), (3, 7006927823), (7, 3002969067), (21, 1000989689), (49, 428995581), (101, 208126569), (147, 142998527), (223, 94263603), (303, 69375523), (343, 61285083), (669, 31421201), (707, 29732367), (907, 23176167), (1029, 20428361), (1561, 13466229), (2121, 9910789), (2721, 7725389), (4683, 4488743), (4949, 4247481), (6349, 3310881), (10927, 1923747), (14847, 1415827), (19047, 1103627), (22523, 933303), (32781, 641249), (34643, 606783), (44443, 472983), (67569, 311101), (76489, 274821), (91607, 229467), (103929, 202261), (133329, 157661)]