20219871

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{491}}^1$

素因数の和:591

約数の個数: 32

約数和(自身を含む): 32306688

約数和(自身を除く): 12086817

約数列:

[1, 3, 7, 21, 37, 53, 111, 159, 259, 371, 491, 777, 1113, 1473, 1961, 3437, 5883, 10311, 13727, 18167, 26023, 41181, 54501, 78069, 127169, 182161, 381507, 546483, 962851, 2888553, 6739957, 20219871]

約数ペア:

[(1, 20219871), (3, 6739957), (7, 2888553), (21, 962851), (37, 546483), (53, 381507), (111, 182161), (159, 127169), (259, 78069), (371, 54501), (491, 41181), (777, 26023), (1113, 18167), (1473, 13727), (1961, 10311), (3437, 5883)]