19731681

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:203

約数の個数: 40

約数和(自身を含む): 30945024

約数和(自身を除く): 11213343

約数列:

[1, 3, 9, 27, 47, 71, 73, 81, 141, 213, 219, 423, 639, 657, 1269, 1917, 1971, 3337, 3431, 3807, 5183, 5751, 5913, 10011, 10293, 15549, 30033, 30879, 46647, 90099, 92637, 139941, 243601, 270297, 277911, 419823, 730803, 2192409, 6577227, 19731681]

約数ペア:

[(1, 19731681), (3, 6577227), (9, 2192409), (27, 730803), (47, 419823), (71, 277911), (73, 270297), (81, 243601), (141, 139941), (213, 92637), (219, 90099), (423, 46647), (639, 30879), (657, 30033), (1269, 15549), (1917, 10293), (1971, 10011), (3337, 5913), (3431, 5751), (3807, 5183)]