18990538

素因数分解:

$2^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:120

約数の個数: 64

約数和(自身を含む): 36864000

約数和(自身を除く): 17873462

約数列:

[1, 2, 7, 14, 19, 31, 38, 47, 49, 62, 94, 98, 133, 217, 266, 329, 343, 434, 589, 658, 686, 893, 931, 1178, 1457, 1519, 1786, 1862, 2303, 2914, 3038, 4123, 4606, 6251, 6517, 8246, 10199, 10633, 12502, 13034, 16121, 20398, 21266, 27683, 28861, 32242, 43757, 55366, 57722, 71393, 87514, 142786, 193781, 202027, 306299, 387562, 404054, 499751, 612598, 999502, 1356467, 2712934, 9495269, 18990538]

約数ペア:

[(1, 18990538), (2, 9495269), (7, 2712934), (14, 1356467), (19, 999502), (31, 612598), (38, 499751), (47, 404054), (49, 387562), (62, 306299), (94, 202027), (98, 193781), (133, 142786), (217, 87514), (266, 71393), (329, 57722), (343, 55366), (434, 43757), (589, 32242), (658, 28861), (686, 27683), (893, 21266), (931, 20398), (1178, 16121), (1457, 13034), (1519, 12502), (1786, 10633), (1862, 10199), (2303, 8246), (2914, 6517), (3038, 6251), (4123, 4606)]