21989864

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{211441}}^1$

素因数の和:211460

約数の個数: 16

約数和(自身を含む): 44402820

約数和(自身を除く): 22412956

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 211441, 422882, 845764, 1691528, 2748733, 5497466, 10994932, 21989864]

約数ペア:

[(1, 21989864), (2, 10994932), (4, 5497466), (8, 2748733), (13, 1691528), (26, 845764), (52, 422882), (104, 211441)]