21512778

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{4787}}^1$

素因数の和:4906

約数の個数: 32

約数和(自身を含む): 49641984

約数和(自身を除く): 28129206

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 107, 214, 321, 642, 749, 1498, 2247, 4494, 4787, 9574, 14361, 28722, 33509, 67018, 100527, 201054, 512209, 1024418, 1536627, 3073254, 3585463, 7170926, 10756389, 21512778]

約数ペア:

[(1, 21512778), (2, 10756389), (3, 7170926), (6, 3585463), (7, 3073254), (14, 1536627), (21, 1024418), (42, 512209), (107, 201054), (214, 100527), (321, 67018), (642, 33509), (749, 28722), (1498, 14361), (2247, 9574), (4494, 4787)]