18987129

素因数分解:

$3^4\times 7^1\times {\mathrm{33487}}^1$

素因数の和:33506

約数の個数: 20

約数和(自身を含む): 32416384

約数和(自身を除く): 13429255

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 33487, 100461, 234409, 301383, 703227, 904149, 2109681, 2712447, 6329043, 18987129]

約数ペア:

[(1, 18987129), (3, 6329043), (7, 2712447), (9, 2109681), (21, 904149), (27, 703227), (63, 301383), (81, 234409), (189, 100461), (567, 33487)]