20493081

素因数分解:

$3^4\times 7^1\times {\mathrm{47}}^1\times {\mathrm{769}}^1$

素因数の和:835

約数の個数: 40

約数和(自身を含む): 35777280

約数和(自身を除く): 15284199

約数列:

[1, 3, 7, 9, 21, 27, 47, 63, 81, 141, 189, 329, 423, 567, 769, 987, 1269, 2307, 2961, 3807, 5383, 6921, 8883, 16149, 20763, 26649, 36143, 48447, 62289, 108429, 145341, 253001, 325287, 436023, 759003, 975861, 2277009, 2927583, 6831027, 20493081]

約数ペア:

[(1, 20493081), (3, 6831027), (7, 2927583), (9, 2277009), (21, 975861), (27, 759003), (47, 436023), (63, 325287), (81, 253001), (141, 145341), (189, 108429), (329, 62289), (423, 48447), (567, 36143), (769, 26649), (987, 20763), (1269, 16149), (2307, 8883), (2961, 6921), (3807, 5383)]