20481447

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{557}}^1$

素因数の和:687

約数の個数: 32

約数和(自身を含む): 33426432

約数和(自身を除く): 12944985

約数列:

[1, 3, 7, 17, 21, 51, 103, 119, 309, 357, 557, 721, 1671, 1751, 2163, 3899, 5253, 9469, 11697, 12257, 28407, 36771, 57371, 66283, 172113, 198849, 401597, 975307, 1204791, 2925921, 6827149, 20481447]

約数ペア:

[(1, 20481447), (3, 6827149), (7, 2925921), (17, 1204791), (21, 975307), (51, 401597), (103, 198849), (119, 172113), (309, 66283), (357, 57371), (557, 36771), (721, 28407), (1671, 12257), (1751, 11697), (2163, 9469), (3899, 5253)]