20880657

素因数分解:

$3^2\times 7^1\times {\mathrm{431}}^1\times {\mathrm{769}}^1$

素因数の和:1213

約数の個数: 24

約数和(自身を含む): 34594560

約数和(自身を除く): 13713903

約数列:

[1, 3, 7, 9, 21, 63, 431, 769, 1293, 2307, 3017, 3879, 5383, 6921, 9051, 16149, 27153, 48447, 331439, 994317, 2320073, 2982951, 6960219, 20880657]

約数ペア:

[(1, 20880657), (3, 6960219), (7, 2982951), (9, 2320073), (21, 994317), (63, 331439), (431, 48447), (769, 27153), (1293, 16149), (2307, 9051), (3017, 6921), (3879, 5383)]