257399805

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{77647}}^1$

素因数の和:77685

約数の個数: 32

約数和(自身を含む): 469615104

約数和(自身を除く): 212215299

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 77647, 232941, 388235, 1009411, 1164705, 1319999, 3028233, 3959997, 5047055, 6599995, 15141165, 17159987, 19799985, 51479961, 85799935, 257399805]

約数ペア:

[(1, 257399805), (3, 85799935), (5, 51479961), (13, 19799985), (15, 17159987), (17, 15141165), (39, 6599995), (51, 5047055), (65, 3959997), (85, 3028233), (195, 1319999), (221, 1164705), (255, 1009411), (663, 388235), (1105, 232941), (3315, 77647)]