19992752

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{347}}^1$

素因数の和:645

約数の個数: 40

約数和(自身を含む): 41986896

約数和(自身を除く): 21994144

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 277, 347, 554, 694, 1108, 1388, 2216, 2776, 3601, 4432, 4511, 5552, 7202, 9022, 14404, 18044, 28808, 36088, 57616, 72176, 96119, 192238, 384476, 768952, 1249547, 1537904, 2499094, 4998188, 9996376, 19992752]

約数ペア:

[(1, 19992752), (2, 9996376), (4, 4998188), (8, 2499094), (13, 1537904), (16, 1249547), (26, 768952), (52, 384476), (104, 192238), (208, 96119), (277, 72176), (347, 57616), (554, 36088), (694, 28808), (1108, 18044), (1388, 14404), (2216, 9022), (2776, 7202), (3601, 5552), (4432, 4511)]