19919781

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{10903}}^1$

素因数の和:10945

約数の個数: 24

約数和(自身を含む): 34020480

約数和(自身を除く): 14100699

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827, 10903, 32709, 76321, 98127, 228963, 316187, 686889, 948561, 2213309, 2845683, 6639927, 19919781]

約数ペア:

[(1, 19919781), (3, 6639927), (7, 2845683), (9, 2213309), (21, 948561), (29, 686889), (63, 316187), (87, 228963), (203, 98127), (261, 76321), (609, 32709), (1827, 10903)]