21500728

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{65551}}^1$

素因数の和:65598

約数の個数: 16

約数和(自身を含む): 41297760

約数和(自身を除く): 19797032

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 65551, 131102, 262204, 524408, 2687591, 5375182, 10750364, 21500728]

約数ペア:

[(1, 21500728), (2, 10750364), (4, 5375182), (8, 2687591), (41, 524408), (82, 262204), (164, 131102), (328, 65551)]