647019

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:139

約数の個数: 24

約数和(自身を含む): 1007760

約数和(自身を除く): 360741

約数列:

[1, 3, 9, 29, 37, 67, 87, 111, 201, 261, 333, 603, 1073, 1943, 2479, 3219, 5829, 7437, 9657, 17487, 22311, 71891, 215673, 647019]

約数ペア:

[(1, 647019), (3, 215673), (9, 71891), (29, 22311), (37, 17487), (67, 9657), (87, 7437), (111, 5829), (201, 3219), (261, 2479), (333, 1943), (603, 1073)]