21696688

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{104311}}^1$

素因数の和:104332

約数の個数: 20

約数和(自身を含む): 45271408

約数和(自身を除く): 23574720

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 104311, 208622, 417244, 834488, 1356043, 1668976, 2712086, 5424172, 10848344, 21696688]

約数ペア:

[(1, 21696688), (2, 10848344), (4, 5424172), (8, 2712086), (13, 1668976), (16, 1356043), (26, 834488), (52, 417244), (104, 208622), (208, 104311)]