20709981

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{431}}^1$

素因数の和:737

約数の個数: 24

約数和(自身を含む): 31674240

約数和(自身を除く): 10964259

約数列:

[1, 3, 9, 19, 57, 171, 281, 431, 843, 1293, 2529, 3879, 5339, 8189, 16017, 24567, 48051, 73701, 121111, 363333, 1089999, 2301109, 6903327, 20709981]

約数ペア:

[(1, 20709981), (3, 6903327), (9, 2301109), (19, 1089999), (57, 363333), (171, 121111), (281, 73701), (431, 48051), (843, 24567), (1293, 16017), (2529, 8189), (3879, 5339)]