21108519

素因数分解:

$3^4\times {\mathrm{421}}^1\times {\mathrm{619}}^1$

素因数の和:1052

約数の個数: 20

約数和(自身を含む): 31658440

約数和(自身を除く): 10549921

約数列:

[1, 3, 9, 27, 81, 421, 619, 1263, 1857, 3789, 5571, 11367, 16713, 34101, 50139, 260599, 781797, 2345391, 7036173, 21108519]

約数ペア:

[(1, 21108519), (3, 7036173), (9, 2345391), (27, 781797), (81, 260599), (421, 50139), (619, 34101), (1263, 16713), (1857, 11367), (3789, 5571)]