21654135

素因数分解:

$3^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{421}}^1$

素因数の和:565

約数の個数: 40

約数和(自身を含む): 39215616

約数和(自身を除く): 17561481

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 127, 135, 381, 405, 421, 635, 1143, 1263, 1905, 2105, 3429, 3789, 5715, 6315, 10287, 11367, 17145, 18945, 34101, 51435, 53467, 56835, 160401, 170505, 267335, 481203, 802005, 1443609, 2406015, 4330827, 7218045, 21654135]

約数ペア:

[(1, 21654135), (3, 7218045), (5, 4330827), (9, 2406015), (15, 1443609), (27, 802005), (45, 481203), (81, 267335), (127, 170505), (135, 160401), (381, 56835), (405, 53467), (421, 51435), (635, 34101), (1143, 18945), (1263, 17145), (1905, 11367), (2105, 10287), (3429, 6315), (3789, 5715)]