20529999

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{661}}^1$

素因数の和:720

約数の個数: 48

約数和(自身を含む): 37177920

約数和(自身を除く): 16647921

約数列:

[1, 3, 7, 9, 17, 21, 29, 51, 63, 87, 119, 153, 203, 261, 357, 493, 609, 661, 1071, 1479, 1827, 1983, 3451, 4437, 4627, 5949, 10353, 11237, 13881, 19169, 31059, 33711, 41643, 57507, 78659, 101133, 134183, 172521, 235977, 325873, 402549, 707931, 977619, 1207647, 2281111, 2932857, 6843333, 20529999]

約数ペア:

[(1, 20529999), (3, 6843333), (7, 2932857), (9, 2281111), (17, 1207647), (21, 977619), (29, 707931), (51, 402549), (63, 325873), (87, 235977), (119, 172521), (153, 134183), (203, 101133), (261, 78659), (357, 57507), (493, 41643), (609, 33711), (661, 31059), (1071, 19169), (1479, 13881), (1827, 11237), (1983, 10353), (3451, 5949), (4437, 4627)]