20715775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{617}}^1$

素因数の和:723

約数の個数: 24

約数和(自身を含む): 27587520

約数和(自身を除く): 6871745

約数列:

[1, 5, 17, 25, 79, 85, 395, 425, 617, 1343, 1975, 3085, 6715, 10489, 15425, 33575, 48743, 52445, 243715, 262225, 828631, 1218575, 4143155, 20715775]

約数ペア:

[(1, 20715775), (5, 4143155), (17, 1218575), (25, 828631), (79, 262225), (85, 243715), (395, 52445), (425, 48743), (617, 33575), (1343, 15425), (1975, 10489), (3085, 6715)]