9990981

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1109}}^1$

素因数の和:1146

約数の個数: 48

約数和(自身を含む): 19393920

約数和(自身を除く): 9402939

約数列:

[1, 3, 7, 9, 11, 13, 21, 33, 39, 63, 77, 91, 99, 117, 143, 231, 273, 429, 693, 819, 1001, 1109, 1287, 3003, 3327, 7763, 9009, 9981, 12199, 14417, 23289, 36597, 43251, 69867, 85393, 100919, 109791, 129753, 158587, 256179, 302757, 475761, 768537, 908271, 1110109, 1427283, 3330327, 9990981]

約数ペア:

[(1, 9990981), (3, 3330327), (7, 1427283), (9, 1110109), (11, 908271), (13, 768537), (21, 475761), (33, 302757), (39, 256179), (63, 158587), (77, 129753), (91, 109791), (99, 100919), (117, 85393), (143, 69867), (231, 43251), (273, 36597), (429, 23289), (693, 14417), (819, 12199), (1001, 9981), (1109, 9009), (1287, 7763), (3003, 3327)]