21989014789

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{541}}^1\times {\mathrm{1129}}^1$

素因数の和:1853

約数の個数: 32

約数和(自身を含む): 26066297600

約数和(自身を除く): 4077282811

約数列:

[1, 7, 37, 139, 259, 541, 973, 1129, 3787, 5143, 7903, 20017, 36001, 41773, 75199, 140119, 156931, 292411, 526393, 610789, 1098517, 2782363, 4275523, 5806447, 19476541, 22599193, 40645129, 84899671, 158194351, 594297697, 3141287827, 21989014789]

約数ペア:

[(1, 21989014789), (7, 3141287827), (37, 594297697), (139, 158194351), (259, 84899671), (541, 40645129), (973, 22599193), (1129, 19476541), (3787, 5806447), (5143, 4275523), (7903, 2782363), (20017, 1098517), (36001, 610789), (41773, 526393), (75199, 292411), (140119, 156931)]