21237986

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{137909}}^1$

素因数の和:137929

約数の個数: 16

約数和(自身を含む): 39718080

約数和(自身を除く): 18480094

約数列:

[1, 2, 7, 11, 14, 22, 77, 154, 137909, 275818, 965363, 1516999, 1930726, 3033998, 10618993, 21237986]

約数ペア:

[(1, 21237986), (2, 10618993), (7, 3033998), (11, 1930726), (14, 1516999), (22, 965363), (77, 275818), (154, 137909)]