18907281

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{647}}^1$

素因数の和:861

約数の個数: 24

約数和(自身を含む): 29113344

約数和(自身を除く): 10206063

約数列:

[1, 3, 9, 17, 51, 153, 191, 573, 647, 1719, 1941, 3247, 5823, 9741, 10999, 29223, 32997, 98991, 123577, 370731, 1112193, 2100809, 6302427, 18907281]

約数ペア:

[(1, 18907281), (3, 6302427), (9, 2100809), (17, 1112193), (51, 370731), (153, 123577), (191, 98991), (573, 32997), (647, 29223), (1719, 10999), (1941, 9741), (3247, 5823)]