20991105

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{24551}}^1$

素因数の和:24581

約数の個数: 24

約数和(自身を含む): 38301120

約数和(自身を除く): 17310015

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855, 24551, 73653, 122755, 220959, 368265, 466469, 1104795, 1399407, 2332345, 4198221, 6997035, 20991105]

約数ペア:

[(1, 20991105), (3, 6997035), (5, 4198221), (9, 2332345), (15, 1399407), (19, 1104795), (45, 466469), (57, 368265), (95, 220959), (171, 122755), (285, 73653), (855, 24551)]