21491210

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{165317}}^1$

素因数の和:165337

約数の個数: 16

約数和(自身を含む): 41660136

約数和(自身を除く): 20168926

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 165317, 330634, 826585, 1653170, 2149121, 4298242, 10745605, 21491210]

約数ペア:

[(1, 21491210), (2, 10745605), (5, 4298242), (10, 2149121), (13, 1653170), (26, 826585), (65, 330634), (130, 165317)]