20540025

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1$

素因数の和:263

約数の個数: 72

約数和(自身を含む): 41280096

約数和(自身を除く): 20740071

約数列:

[1, 3, 5, 9, 11, 15, 25, 33, 43, 45, 55, 75, 99, 129, 165, 193, 215, 225, 275, 387, 473, 495, 579, 645, 825, 965, 1075, 1419, 1737, 1935, 2123, 2365, 2475, 2895, 3225, 4257, 4825, 6369, 7095, 8299, 8685, 9675, 10615, 11825, 14475, 19107, 21285, 24897, 31845, 35475, 41495, 43425, 53075, 74691, 91289, 95535, 106425, 124485, 159225, 207475, 273867, 373455, 456445, 477675, 622425, 821601, 1369335, 1867275, 2282225, 4108005, 6846675, 20540025]

約数ペア:

[(1, 20540025), (3, 6846675), (5, 4108005), (9, 2282225), (11, 1867275), (15, 1369335), (25, 821601), (33, 622425), (43, 477675), (45, 456445), (55, 373455), (75, 273867), (99, 207475), (129, 159225), (165, 124485), (193, 106425), (215, 95535), (225, 91289), (275, 74691), (387, 53075), (473, 43425), (495, 41495), (579, 35475), (645, 31845), (825, 24897), (965, 21285), (1075, 19107), (1419, 14475), (1737, 11825), (1935, 10615), (2123, 9675), (2365, 8685), (2475, 8299), (2895, 7095), (3225, 6369), (4257, 4825)]