21257826

素因数分解:

$2^1\times 3^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{359}}^1$

素因数の和:574

約数の個数: 32

約数和(自身を含む): 43545600

約数和(自身を除く): 22287774

約数列:

[1, 2, 3, 6, 71, 139, 142, 213, 278, 359, 417, 426, 718, 834, 1077, 2154, 9869, 19738, 25489, 29607, 49901, 50978, 59214, 76467, 99802, 149703, 152934, 299406, 3542971, 7085942, 10628913, 21257826]

約数ペア:

[(1, 21257826), (2, 10628913), (3, 7085942), (6, 3542971), (71, 299406), (139, 152934), (142, 149703), (213, 99802), (278, 76467), (359, 59214), (417, 50978), (426, 49901), (718, 29607), (834, 25489), (1077, 19738), (2154, 9869)]