208519647

素因数分解:

$3^1\times 7^4\times {\mathrm{28949}}^1$

素因数の和:28980

約数の個数: 20

約数和(自身を含む): 324355800

約数和(自身を除く): 115836153

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 7203, 28949, 86847, 202643, 607929, 1418501, 4255503, 9929507, 29788521, 69506549, 208519647]

約数ペア:

[(1, 208519647), (3, 69506549), (7, 29788521), (21, 9929507), (49, 4255503), (147, 1418501), (343, 607929), (1029, 202643), (2401, 86847), (7203, 28949)]