21511509

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{4391}}^1$

素因数の和:4488

約数の個数: 16

約数和(自身を含む): 30357504

約数和(自身を除く): 8845995

約数列:

[1, 3, 23, 69, 71, 213, 1633, 4391, 4899, 13173, 100993, 302979, 311761, 935283, 7170503, 21511509]

約数ペア:

[(1, 21511509), (3, 7170503), (23, 935283), (69, 311761), (71, 302979), (213, 100993), (1633, 13173), (4391, 4899)]