28128141

素因数分解:

$3^4\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:223

約数の個数: 40

約数和(自身を含む): 43838784

約数和(自身を除く): 15710643

約数列:

[1, 3, 9, 27, 67, 71, 73, 81, 201, 213, 219, 603, 639, 657, 1809, 1917, 1971, 4757, 4891, 5183, 5427, 5751, 5913, 14271, 14673, 15549, 42813, 44019, 46647, 128439, 132057, 139941, 347261, 385317, 396171, 419823, 1041783, 3125349, 9376047, 28128141]

約数ペア:

[(1, 28128141), (3, 9376047), (9, 3125349), (27, 1041783), (67, 419823), (71, 396171), (73, 385317), (81, 347261), (201, 139941), (213, 132057), (219, 128439), (603, 46647), (639, 44019), (657, 42813), (1809, 15549), (1917, 14673), (1971, 14271), (4757, 5913), (4891, 5751), (5183, 5427)]