21713810

素因数分解:

$2^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{5309}}^1$

素因数の和:5725

約数の個数: 16

約数和(自身を含む): 39187800

約数和(自身を除く): 17473990

約数列:

[1, 2, 5, 10, 409, 818, 2045, 4090, 5309, 10618, 26545, 53090, 2171381, 4342762, 10856905, 21713810]

約数ペア:

[(1, 21713810), (2, 10856905), (5, 4342762), (10, 2171381), (409, 53090), (818, 26545), (2045, 10618), (4090, 5309)]