20398880

素因数分解:

$2^5\times 5^1\times {\mathrm{127493}}^1$

素因数の和:127508

約数の個数: 24

約数和(自身を含む): 48192732

約数和(自身を除く): 27793852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 127493, 254986, 509972, 637465, 1019944, 1274930, 2039888, 2549860, 4079776, 5099720, 10199440, 20398880]

約数ペア:

[(1, 20398880), (2, 10199440), (4, 5099720), (5, 4079776), (8, 2549860), (10, 2039888), (16, 1274930), (20, 1019944), (32, 637465), (40, 509972), (80, 254986), (160, 127493)]