21990388

素因数分解:

$2^2\times 7^1\times {\mathrm{439}}^1\times {\mathrm{1789}}^1$

素因数の和:2239

約数の個数: 24

約数和(自身を含む): 44105600

約数和(自身を除く): 22115212

約数列:

[1, 2, 4, 7, 14, 28, 439, 878, 1756, 1789, 3073, 3578, 6146, 7156, 12292, 12523, 25046, 50092, 785371, 1570742, 3141484, 5497597, 10995194, 21990388]

約数ペア:

[(1, 21990388), (2, 10995194), (4, 5497597), (7, 3141484), (14, 1570742), (28, 785371), (439, 50092), (878, 25046), (1756, 12523), (1789, 12292), (3073, 7156), (3578, 6146)]