257716290

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{660811}}^1$

素因数の和:660834

約数の個数: 32

約数和(自身を含む): 666098496

約数和(自身を除く): 408382206

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 660811, 1321622, 1982433, 3304055, 3964866, 6608110, 8590543, 9912165, 17181086, 19824330, 25771629, 42952715, 51543258, 85905430, 128858145, 257716290]

約数ペア:

[(1, 257716290), (2, 128858145), (3, 85905430), (5, 51543258), (6, 42952715), (10, 25771629), (13, 19824330), (15, 17181086), (26, 9912165), (30, 8590543), (39, 6608110), (65, 3964866), (78, 3304055), (130, 1982433), (195, 1321622), (390, 660811)]