20289075

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{15913}}^1$

素因数の和:15943

約数の個数: 24

約数和(自身を含む): 35520048

約数和(自身を除く): 15230973

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 15913, 47739, 79565, 238695, 270521, 397825, 811563, 1193475, 1352605, 4057815, 6763025, 20289075]

約数ペア:

[(1, 20289075), (3, 6763025), (5, 4057815), (15, 1352605), (17, 1193475), (25, 811563), (51, 397825), (75, 270521), (85, 238695), (255, 79565), (425, 47739), (1275, 15913)]