20281149

素因数分解:

$3^2\times 7^2\times {\mathrm{45989}}^1$

素因数の和:46009

約数の個数: 18

約数和(自身を含む): 34078590

約数和(自身を除く): 13797441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45989, 137967, 321923, 413901, 965769, 2253461, 2897307, 6760383, 20281149]

約数ペア:

[(1, 20281149), (3, 6760383), (7, 2897307), (9, 2253461), (21, 965769), (49, 413901), (63, 321923), (147, 137967), (441, 45989)]