128828721

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{4423}}^1$

素因数の和:4525

約数の個数: 32

約数和(自身を含む): 209520640

約数和(自身を除く): 80691919

約数列:

[1, 3, 7, 19, 21, 57, 73, 133, 219, 399, 511, 1387, 1533, 4161, 4423, 9709, 13269, 29127, 30961, 84037, 92883, 252111, 322879, 588259, 968637, 1764777, 2260153, 6134701, 6780459, 18404103, 42942907, 128828721]

約数ペア:

[(1, 128828721), (3, 42942907), (7, 18404103), (19, 6780459), (21, 6134701), (57, 2260153), (73, 1764777), (133, 968637), (219, 588259), (399, 322879), (511, 252111), (1387, 92883), (1533, 84037), (4161, 30961), (4423, 29127), (9709, 13269)]