209728820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{214009}}^1$

素因数の和:214032

約数の個数: 36

約数和(自身を含む): 512339940

約数和(自身を除く): 302611120

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 214009, 428018, 856036, 1070045, 1498063, 2140090, 2996126, 4280180, 5992252, 7490315, 10486441, 14980630, 20972882, 29961260, 41945764, 52432205, 104864410, 209728820]

約数ペア:

[(1, 209728820), (2, 104864410), (4, 52432205), (5, 41945764), (7, 29961260), (10, 20972882), (14, 14980630), (20, 10486441), (28, 7490315), (35, 5992252), (49, 4280180), (70, 2996126), (98, 2140090), (140, 1498063), (196, 1070045), (245, 856036), (490, 428018), (980, 214009)]