21312291

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{151}}^1$

素因数の和:232

約数の個数: 64

約数和(自身を含む): 39223296

約数和(自身を除く): 17911005

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 47, 77, 91, 141, 143, 151, 231, 273, 329, 429, 453, 517, 611, 987, 1001, 1057, 1551, 1661, 1833, 1963, 3003, 3171, 3619, 4277, 4983, 5889, 6721, 7097, 10857, 11627, 12831, 13741, 20163, 21291, 21593, 34881, 41223, 47047, 49679, 64779, 78067, 92261, 141141, 149037, 151151, 234201, 276783, 453453, 546469, 645827, 1014871, 1639407, 1937481, 3044613, 7104097, 21312291]

約数ペア:

[(1, 21312291), (3, 7104097), (7, 3044613), (11, 1937481), (13, 1639407), (21, 1014871), (33, 645827), (39, 546469), (47, 453453), (77, 276783), (91, 234201), (141, 151151), (143, 149037), (151, 141141), (231, 92261), (273, 78067), (329, 64779), (429, 49679), (453, 47047), (517, 41223), (611, 34881), (987, 21593), (1001, 21291), (1057, 20163), (1551, 13741), (1661, 12831), (1833, 11627), (1963, 10857), (3003, 7097), (3171, 6721), (3619, 5889), (4277, 4983)]