21700016

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{104327}}^1$

素因数の和:104348

約数の個数: 20

約数和(自身を含む): 45278352

約数和(自身を除く): 23578336

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 104327, 208654, 417308, 834616, 1356251, 1669232, 2712502, 5425004, 10850008, 21700016]

約数ペア:

[(1, 21700016), (2, 10850008), (4, 5425004), (8, 2712502), (13, 1669232), (16, 1356251), (26, 834616), (52, 417308), (104, 208654), (208, 104327)]