20829879

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2161}}^1$

素因数の和:2197

約数の個数: 40

約数和(自身を含む): 37670688

約数和(自身を除く): 16840809

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 81, 119, 153, 189, 357, 459, 567, 1071, 1377, 2161, 3213, 6483, 9639, 15127, 19449, 36737, 45381, 58347, 110211, 136143, 175041, 257159, 330633, 408429, 771477, 991899, 1225287, 2314431, 2975697, 6943293, 20829879]

約数ペア:

[(1, 20829879), (3, 6943293), (7, 2975697), (9, 2314431), (17, 1225287), (21, 991899), (27, 771477), (51, 408429), (63, 330633), (81, 257159), (119, 175041), (153, 136143), (189, 110211), (357, 58347), (459, 45381), (567, 36737), (1071, 19449), (1377, 15127), (2161, 9639), (3213, 6483)]