21427911

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{179}}^1\times {\mathrm{283}}^1$

素因数の和:515

約数の個数: 24

約数和(自身を含む): 31898880

約数和(自身を除く): 10470969

約数列:

[1, 3, 9, 47, 141, 179, 283, 423, 537, 849, 1611, 2547, 8413, 13301, 25239, 39903, 50657, 75717, 119709, 151971, 455913, 2380879, 7142637, 21427911]

約数ペア:

[(1, 21427911), (3, 7142637), (9, 2380879), (47, 455913), (141, 151971), (179, 119709), (283, 75717), (423, 50657), (537, 39903), (849, 25239), (1611, 13301), (2547, 8413)]