21420459

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{733}}^1$

素因数の和:947

約数の個数: 24

約数和(自身を含む): 32977152

約数和(自身を除く): 11556693

約数列:

[1, 3, 9, 17, 51, 153, 191, 573, 733, 1719, 2199, 3247, 6597, 9741, 12461, 29223, 37383, 112149, 140003, 420009, 1260027, 2380051, 7140153, 21420459]

約数ペア:

[(1, 21420459), (3, 7140153), (9, 2380051), (17, 1260027), (51, 420009), (153, 140003), (191, 112149), (573, 37383), (733, 29223), (1719, 12461), (2199, 9741), (3247, 6597)]