20979830907

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{971}}^1\times {\mathrm{7297}}^1$

素因数の和:8328

約数の個数: 48

約数和(自身を含む): 35411530752

約数和(自身を除く): 14431699845

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 971, 987, 2913, 2961, 6797, 7297, 8739, 20391, 21891, 45637, 51079, 61173, 65673, 136911, 153237, 319459, 342959, 410733, 459711, 958377, 1028877, 2400713, 2875131, 3086631, 7085387, 7202139, 21256161, 21606417, 49597709, 63768483, 148793127, 333013189, 446379381, 999039567, 2331092323, 2997118701, 6993276969, 20979830907]

約数ペア:

[(1, 20979830907), (3, 6993276969), (7, 2997118701), (9, 2331092323), (21, 999039567), (47, 446379381), (63, 333013189), (141, 148793127), (329, 63768483), (423, 49597709), (971, 21606417), (987, 21256161), (2913, 7202139), (2961, 7085387), (6797, 3086631), (7297, 2875131), (8739, 2400713), (20391, 1028877), (21891, 958377), (45637, 459711), (51079, 410733), (61173, 342959), (65673, 319459), (136911, 153237)]