21109563

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{281}}^1\times {\mathrm{491}}^1$

素因数の和:795

約数の個数: 24

約数和(自身を含む): 32466096

約数和(自身を除く): 11356533

約数列:

[1, 3, 9, 17, 51, 153, 281, 491, 843, 1473, 2529, 4419, 4777, 8347, 14331, 25041, 42993, 75123, 137971, 413913, 1241739, 2345507, 7036521, 21109563]

約数ペア:

[(1, 21109563), (3, 7036521), (9, 2345507), (17, 1241739), (51, 413913), (153, 137971), (281, 75123), (491, 42993), (843, 25041), (1473, 14331), (2529, 8347), (4419, 4777)]