21208816

素因数分解:

$2^4\times {\mathrm{157}}^1\times {\mathrm{8443}}^1$

素因数の和:8608

約数の個数: 20

約数和(自身を含む): 41358712

約数和(自身を除く): 20149896

約数列:

[1, 2, 4, 8, 16, 157, 314, 628, 1256, 2512, 8443, 16886, 33772, 67544, 135088, 1325551, 2651102, 5302204, 10604408, 21208816]

約数ペア:

[(1, 21208816), (2, 10604408), (4, 5302204), (8, 2651102), (16, 1325551), (157, 135088), (314, 67544), (628, 33772), (1256, 16886), (2512, 8443)]