21438280

素因数分解:

$2^3\times 5^1\times {\mathrm{535957}}^1$

素因数の和:535968

約数の個数: 16

約数和(自身を含む): 48236220

約数和(自身を除く): 26797940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 535957, 1071914, 2143828, 2679785, 4287656, 5359570, 10719140, 21438280]

約数ペア:

[(1, 21438280), (2, 10719140), (4, 5359570), (5, 4287656), (8, 2679785), (10, 2143828), (20, 1071914), (40, 535957)]