257851971

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{547}}^1$

素因数の和:665

約数の個数: 64

約数和(自身を含む): 441907200

約数和(自身を除く): 184055229

約数列:

[1, 3, 9, 13, 17, 27, 39, 51, 79, 117, 153, 221, 237, 351, 459, 547, 663, 711, 1027, 1343, 1641, 1989, 2133, 3081, 4029, 4923, 5967, 7111, 9243, 9299, 12087, 14769, 17459, 21333, 27729, 27897, 36261, 43213, 52377, 63999, 83691, 120887, 129639, 157131, 191997, 251073, 362661, 388917, 471393, 561769, 734621, 1087983, 1166751, 1685307, 2203863, 3263949, 5055921, 6611589, 9550073, 15167763, 19834767, 28650219, 85950657, 257851971]

約数ペア:

[(1, 257851971), (3, 85950657), (9, 28650219), (13, 19834767), (17, 15167763), (27, 9550073), (39, 6611589), (51, 5055921), (79, 3263949), (117, 2203863), (153, 1685307), (221, 1166751), (237, 1087983), (351, 734621), (459, 561769), (547, 471393), (663, 388917), (711, 362661), (1027, 251073), (1343, 191997), (1641, 157131), (1989, 129639), (2133, 120887), (3081, 83691), (4029, 63999), (4923, 52377), (5967, 43213), (7111, 36261), (9243, 27897), (9299, 27729), (12087, 21333), (14769, 17459)]