20457400

素因数分解:

$2^3\times 5^2\times {\mathrm{233}}^1\times {\mathrm{439}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 47876400

約数和(自身を除く): 27419000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 233, 439, 466, 878, 932, 1165, 1756, 1864, 2195, 2330, 3512, 4390, 4660, 5825, 8780, 9320, 10975, 11650, 17560, 21950, 23300, 43900, 46600, 87800, 102287, 204574, 409148, 511435, 818296, 1022870, 2045740, 2557175, 4091480, 5114350, 10228700, 20457400]

約数ペア:

[(1, 20457400), (2, 10228700), (4, 5114350), (5, 4091480), (8, 2557175), (10, 2045740), (20, 1022870), (25, 818296), (40, 511435), (50, 409148), (100, 204574), (200, 102287), (233, 87800), (439, 46600), (466, 43900), (878, 23300), (932, 21950), (1165, 17560), (1756, 11650), (1864, 10975), (2195, 9320), (2330, 8780), (3512, 5825), (4390, 4660)]