21031395

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:296

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 21546525

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 131, 139, 165, 231, 385, 393, 417, 655, 695, 917, 973, 1155, 1441, 1529, 1965, 2085, 2751, 2919, 4323, 4585, 4587, 4865, 7205, 7645, 10087, 10703, 13755, 14595, 18209, 21615, 22935, 30261, 32109, 50435, 53515, 54627, 91045, 127463, 151305, 160545, 200299, 273135, 382389, 600897, 637315, 1001495, 1402093, 1911945, 3004485, 4206279, 7010465, 21031395]

約数ペア:

[(1, 21031395), (3, 7010465), (5, 4206279), (7, 3004485), (11, 1911945), (15, 1402093), (21, 1001495), (33, 637315), (35, 600897), (55, 382389), (77, 273135), (105, 200299), (131, 160545), (139, 151305), (165, 127463), (231, 91045), (385, 54627), (393, 53515), (417, 50435), (655, 32109), (695, 30261), (917, 22935), (973, 21615), (1155, 18209), (1441, 14595), (1529, 13755), (1965, 10703), (2085, 10087), (2751, 7645), (2919, 7205), (4323, 4865), (4585, 4587)]