21038862

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:249

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 26861298

約数列:

[1, 2, 3, 6, 13, 26, 29, 39, 58, 71, 78, 87, 131, 142, 174, 213, 262, 377, 393, 426, 754, 786, 923, 1131, 1703, 1846, 2059, 2262, 2769, 3406, 3799, 4118, 5109, 5538, 6177, 7598, 9301, 10218, 11397, 12354, 18602, 22794, 26767, 27903, 49387, 53534, 55806, 80301, 98774, 120913, 148161, 160602, 241826, 269729, 296322, 362739, 539458, 725478, 809187, 1618374, 3506477, 7012954, 10519431, 21038862]

約数ペア:

[(1, 21038862), (2, 10519431), (3, 7012954), (6, 3506477), (13, 1618374), (26, 809187), (29, 725478), (39, 539458), (58, 362739), (71, 296322), (78, 269729), (87, 241826), (131, 160602), (142, 148161), (174, 120913), (213, 98774), (262, 80301), (377, 55806), (393, 53534), (426, 49387), (754, 27903), (786, 26767), (923, 22794), (1131, 18602), (1703, 12354), (1846, 11397), (2059, 10218), (2262, 9301), (2769, 7598), (3406, 6177), (3799, 5538), (4118, 5109)]