20725971

素因数分解:

$3^1\times 7^2\times {\mathrm{277}}^1\times {\mathrm{509}}^1$

素因数の和:803

約数の個数: 24

約数和(自身を含む): 32325840

約数和(自身を除く): 11599869

約数列:

[1, 3, 7, 21, 49, 147, 277, 509, 831, 1527, 1939, 3563, 5817, 10689, 13573, 24941, 40719, 74823, 140993, 422979, 986951, 2960853, 6908657, 20725971]

約数ペア:

[(1, 20725971), (3, 6908657), (7, 2960853), (21, 986951), (49, 422979), (147, 140993), (277, 74823), (509, 40719), (831, 24941), (1527, 13573), (1939, 10689), (3563, 5817)]