81780118

素因数分解:

$2^1\times 7^3\times {\mathrm{97}}^1\times {\mathrm{1229}}^1$

素因数の和:1349

約数の個数: 32

約数和(自身を含む): 144648000

約数和(自身を除く): 62867882

約数列:

[1, 2, 7, 14, 49, 97, 98, 194, 343, 679, 686, 1229, 1358, 2458, 4753, 8603, 9506, 17206, 33271, 60221, 66542, 119213, 120442, 238426, 421547, 834491, 843094, 1668982, 5841437, 11682874, 40890059, 81780118]

約数ペア:

[(1, 81780118), (2, 40890059), (7, 11682874), (14, 5841437), (49, 1668982), (97, 843094), (98, 834491), (194, 421547), (343, 238426), (679, 120442), (686, 119213), (1229, 66542), (1358, 60221), (2458, 33271), (4753, 17206), (8603, 9506)]