18664821

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{503}}^1$

素因数の和:566

約数の個数: 48

約数和(自身を含む): 33546240

約数和(自身を除く): 14881419

約数列:

[1, 3, 7, 9, 19, 21, 31, 57, 63, 93, 133, 171, 217, 279, 399, 503, 589, 651, 1197, 1509, 1767, 1953, 3521, 4123, 4527, 5301, 9557, 10563, 12369, 15593, 28671, 31689, 37107, 46779, 66899, 86013, 109151, 140337, 200697, 296267, 327453, 602091, 888801, 982359, 2073869, 2666403, 6221607, 18664821]

約数ペア:

[(1, 18664821), (3, 6221607), (7, 2666403), (9, 2073869), (19, 982359), (21, 888801), (31, 602091), (57, 327453), (63, 296267), (93, 200697), (133, 140337), (171, 109151), (217, 86013), (279, 66899), (399, 46779), (503, 37107), (589, 31689), (651, 28671), (1197, 15593), (1509, 12369), (1767, 10563), (1953, 9557), (3521, 5301), (4123, 4527)]