20903504

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1321}}^1$

素因数の和:1395

約数の個数: 40

約数和(自身を含む): 43276992

約数和(自身を除く): 22373488

約数列:

[1, 2, 4, 8, 16, 23, 43, 46, 86, 92, 172, 184, 344, 368, 688, 989, 1321, 1978, 2642, 3956, 5284, 7912, 10568, 15824, 21136, 30383, 56803, 60766, 113606, 121532, 227212, 243064, 454424, 486128, 908848, 1306469, 2612938, 5225876, 10451752, 20903504]

約数ペア:

[(1, 20903504), (2, 10451752), (4, 5225876), (8, 2612938), (16, 1306469), (23, 908848), (43, 486128), (46, 454424), (86, 243064), (92, 227212), (172, 121532), (184, 113606), (344, 60766), (368, 56803), (688, 30383), (989, 21136), (1321, 15824), (1978, 10568), (2642, 7912), (3956, 5284)]