217380980

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{27941}}^1$

素因数の和:28339

約数の個数: 24

約数和(自身を含む): 457689960

約数和(自身を除く): 240308980

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 27941, 55882, 111764, 139705, 279410, 558820, 10869049, 21738098, 43476196, 54345245, 108690490, 217380980]

約数ペア:

[(1, 217380980), (2, 108690490), (4, 54345245), (5, 43476196), (10, 21738098), (20, 10869049), (389, 558820), (778, 279410), (1556, 139705), (1945, 111764), (3890, 55882), (7780, 27941)]