257734905

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{21031}}^1$

素因数の和:21101

約数の個数: 32

約数和(自身を含む): 444195840

約数和(自身を除く): 186460935

約数列:

[1, 3, 5, 15, 19, 43, 57, 95, 129, 215, 285, 645, 817, 2451, 4085, 12255, 21031, 63093, 105155, 315465, 399589, 904333, 1198767, 1997945, 2712999, 4521665, 5993835, 13564995, 17182327, 51546981, 85911635, 257734905]

約数ペア:

[(1, 257734905), (3, 85911635), (5, 51546981), (15, 17182327), (19, 13564995), (43, 5993835), (57, 4521665), (95, 2712999), (129, 1997945), (215, 1198767), (285, 904333), (645, 399589), (817, 315465), (2451, 105155), (4085, 63093), (12255, 21031)]