399256557

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{142949}}^1$

素因数の和:142985

約数の個数: 24

約数和(自身を含む): 651852000

約数和(自身を除く): 252595443

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 142949, 428847, 1000643, 2716031, 3001929, 7004501, 8148093, 19012217, 21013503, 57036651, 133085519, 399256557]

約数ペア:

[(1, 399256557), (3, 133085519), (7, 57036651), (19, 21013503), (21, 19012217), (49, 8148093), (57, 7004501), (133, 3001929), (147, 2716031), (399, 1000643), (931, 428847), (2793, 142949)]