21643557

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{283}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 32635008

約数和(自身を除く): 10991451

約数列:

[1, 3, 13, 37, 39, 53, 111, 159, 283, 481, 689, 849, 1443, 1961, 2067, 3679, 5883, 10471, 11037, 14999, 25493, 31413, 44997, 76479, 136123, 194987, 408369, 554963, 584961, 1664889, 7214519, 21643557]

約数ペア:

[(1, 21643557), (3, 7214519), (13, 1664889), (37, 584961), (39, 554963), (53, 408369), (111, 194987), (159, 136123), (283, 76479), (481, 44997), (689, 31413), (849, 25493), (1443, 14999), (1961, 11037), (2067, 10471), (3679, 5883)]