20906221

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{1523}}^1$

素因数の和:1620

約数の個数: 16

約数和(自身を含む): 25017984

約数和(自身を除く): 4111763

約数列:

[1, 7, 37, 53, 259, 371, 1523, 1961, 10661, 13727, 56351, 80719, 394457, 565033, 2986603, 20906221]

約数ペア:

[(1, 20906221), (7, 2986603), (37, 565033), (53, 394457), (259, 80719), (371, 56351), (1523, 13727), (1961, 10661)]