20279440

素因数分解:

$2^4\times 5^1\times {\mathrm{253493}}^1$

素因数の和:253506

約数の個数: 20

約数和(自身を含む): 47149884

約数和(自身を除く): 26870444

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 253493, 506986, 1013972, 1267465, 2027944, 2534930, 4055888, 5069860, 10139720, 20279440]

約数ペア:

[(1, 20279440), (2, 10139720), (4, 5069860), (5, 4055888), (8, 2534930), (10, 2027944), (16, 1267465), (20, 1013972), (40, 506986), (80, 253493)]