20070981

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{239}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 35143680

約数和(自身を除く): 15072699

約数列:

[1, 3, 7, 9, 21, 31, 43, 63, 93, 129, 217, 239, 279, 301, 387, 651, 717, 903, 1333, 1673, 1953, 2151, 2709, 3999, 5019, 7409, 9331, 10277, 11997, 15057, 22227, 27993, 30831, 51863, 66681, 71939, 83979, 92493, 155589, 215817, 318587, 466767, 647451, 955761, 2230109, 2867283, 6690327, 20070981]

約数ペア:

[(1, 20070981), (3, 6690327), (7, 2867283), (9, 2230109), (21, 955761), (31, 647451), (43, 466767), (63, 318587), (93, 215817), (129, 155589), (217, 92493), (239, 83979), (279, 71939), (301, 66681), (387, 51863), (651, 30831), (717, 27993), (903, 22227), (1333, 15057), (1673, 11997), (1953, 10277), (2151, 9331), (2709, 7409), (3999, 5019)]