20871741

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{257}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 32099328

約数和(自身を除く): 11227587

約数列:

[1, 3, 11, 23, 33, 69, 107, 253, 257, 321, 759, 771, 1177, 2461, 2827, 3531, 5911, 7383, 8481, 17733, 27071, 27499, 65021, 81213, 82497, 195063, 302489, 632477, 907467, 1897431, 6957247, 20871741]

約数ペア:

[(1, 20871741), (3, 6957247), (11, 1897431), (23, 907467), (33, 632477), (69, 302489), (107, 195063), (253, 82497), (257, 81213), (321, 65021), (759, 27499), (771, 27071), (1177, 17733), (2461, 8481), (2827, 7383), (3531, 5911)]