81978386

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:243

約数の個数: 64

約数和(自身を含む): 155457792

約数和(自身を除く): 73479406

約数列:

[1, 2, 7, 14, 17, 34, 53, 67, 97, 106, 119, 134, 194, 238, 371, 469, 679, 742, 901, 938, 1139, 1358, 1649, 1802, 2278, 3298, 3551, 5141, 6307, 6499, 7102, 7973, 10282, 11543, 12614, 12998, 15946, 23086, 24857, 35987, 45493, 49714, 60367, 71974, 87397, 90986, 110483, 120734, 174794, 220966, 344447, 422569, 611779, 688894, 773381, 845138, 1223558, 1546762, 2411129, 4822258, 5855599, 11711198, 40989193, 81978386]

約数ペア:

[(1, 81978386), (2, 40989193), (7, 11711198), (14, 5855599), (17, 4822258), (34, 2411129), (53, 1546762), (67, 1223558), (97, 845138), (106, 773381), (119, 688894), (134, 611779), (194, 422569), (238, 344447), (371, 220966), (469, 174794), (679, 120734), (742, 110483), (901, 90986), (938, 87397), (1139, 71974), (1358, 60367), (1649, 49714), (1802, 45493), (2278, 35987), (3298, 24857), (3551, 23086), (5141, 15946), (6307, 12998), (6499, 12614), (7102, 11543), (7973, 10282)]