21900213

素因数分解:

$3^4\times {\mathrm{167}}^1\times {\mathrm{1619}}^1$

素因数の和:1798

約数の個数: 20

約数和(自身を含む): 32931360

約数和(自身を除く): 11031147

約数列:

[1, 3, 9, 27, 81, 167, 501, 1503, 1619, 4509, 4857, 13527, 14571, 43713, 131139, 270373, 811119, 2433357, 7300071, 21900213]

約数ペア:

[(1, 21900213), (3, 7300071), (9, 2433357), (27, 811119), (81, 270373), (167, 131139), (501, 43713), (1503, 14571), (1619, 13527), (4509, 4857)]