20785821

素因数分解:

$3^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{4691}}^1$

素因数の和:4912

約数の個数: 16

約数和(自身を含む): 31830528

約数和(自身を除く): 11044707

約数列:

[1, 3, 7, 21, 211, 633, 1477, 4431, 4691, 14073, 32837, 98511, 989801, 2969403, 6928607, 20785821]

約数ペア:

[(1, 20785821), (3, 6928607), (7, 2969403), (21, 989801), (211, 98511), (633, 32837), (1477, 14073), (4431, 4691)]