21187964

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{39827}}^1$

素因数の和:39857

約数の個数: 24

約数和(自身を含む): 44607360

約数和(自身を除く): 23419396

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 266, 532, 39827, 79654, 159308, 278789, 557578, 756713, 1115156, 1513426, 3026852, 5296991, 10593982, 21187964]

約数ペア:

[(1, 21187964), (2, 10593982), (4, 5296991), (7, 3026852), (14, 1513426), (19, 1115156), (28, 756713), (38, 557578), (76, 278789), (133, 159308), (266, 79654), (532, 39827)]