21459963

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:507

約数の個数: 32

約数和(自身を含む): 34145280

約数和(自身を除く): 12685317

約数列:

[1, 3, 7, 21, 37, 71, 111, 213, 259, 389, 497, 777, 1167, 1491, 2627, 2723, 7881, 8169, 14393, 18389, 27619, 43179, 55167, 82857, 100751, 193333, 302253, 579999, 1021903, 3065709, 7153321, 21459963]

約数ペア:

[(1, 21459963), (3, 7153321), (7, 3065709), (21, 1021903), (37, 579999), (71, 302253), (111, 193333), (213, 100751), (259, 82857), (389, 55167), (497, 43179), (777, 27619), (1167, 18389), (1491, 14393), (2627, 8169), (2723, 7881)]