20986515

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{42397}}^1$

素因数の和:42419

約数の個数: 24

約数和(自身を含む): 39684528

約数和(自身を除く): 18698013

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 165, 495, 42397, 127191, 211985, 381573, 466367, 635955, 1399101, 1907865, 2331835, 4197303, 6995505, 20986515]

約数ペア:

[(1, 20986515), (3, 6995505), (5, 4197303), (9, 2331835), (11, 1907865), (15, 1399101), (33, 635955), (45, 466367), (55, 381573), (99, 211985), (165, 127191), (495, 42397)]