21107709

素因数分解:

$3^5\times 7^1\times {\mathrm{12409}}^1$

素因数の和:12431

約数の個数: 24

約数和(自身を含む): 36137920

約数和(自身を除く): 15030211

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 12409, 37227, 86863, 111681, 260589, 335043, 781767, 1005129, 2345301, 3015387, 7035903, 21107709]

約数ペア:

[(1, 21107709), (3, 7035903), (7, 3015387), (9, 2345301), (21, 1005129), (27, 781767), (63, 335043), (81, 260589), (189, 111681), (243, 86863), (567, 37227), (1701, 12409)]