21198280

素因数分解:

$2^3\times 5^1\times {\mathrm{529957}}^1$

素因数の和:529968

約数の個数: 16

約数和(自身を含む): 47696220

約数和(自身を除く): 26497940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 529957, 1059914, 2119828, 2649785, 4239656, 5299570, 10599140, 21198280]

約数ペア:

[(1, 21198280), (2, 10599140), (4, 5299570), (5, 4239656), (8, 2649785), (10, 2119828), (20, 1059914), (40, 529957)]