20495625

素因数分解:

$3^1\times 5^4\times {\mathrm{17}}^1\times {\mathrm{643}}^1$

素因数の和:683

約数の個数: 40

約数和(自身を含む): 36213408

約数和(自身を除く): 15717783

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 125, 255, 375, 425, 625, 643, 1275, 1875, 1929, 2125, 3215, 6375, 9645, 10625, 10931, 16075, 31875, 32793, 48225, 54655, 80375, 163965, 241125, 273275, 401875, 819825, 1205625, 1366375, 4099125, 6831875, 20495625]

約数ペア:

[(1, 20495625), (3, 6831875), (5, 4099125), (15, 1366375), (17, 1205625), (25, 819825), (51, 401875), (75, 273275), (85, 241125), (125, 163965), (255, 80375), (375, 54655), (425, 48225), (625, 32793), (643, 31875), (1275, 16075), (1875, 10931), (1929, 10625), (2125, 9645), (3215, 6375)]