20991232

素因数分解:

$2^8\times {\mathrm{167}}^1\times {\mathrm{491}}^1$

素因数の和:674

約数の個数: 36

約数和(自身を含む): 42237216

約数和(自身を除く): 21245984

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 167, 256, 334, 491, 668, 982, 1336, 1964, 2672, 3928, 5344, 7856, 10688, 15712, 21376, 31424, 42752, 62848, 81997, 125696, 163994, 327988, 655976, 1311952, 2623904, 5247808, 10495616, 20991232]

約数ペア:

[(1, 20991232), (2, 10495616), (4, 5247808), (8, 2623904), (16, 1311952), (32, 655976), (64, 327988), (128, 163994), (167, 125696), (256, 81997), (334, 62848), (491, 42752), (668, 31424), (982, 21376), (1336, 15712), (1964, 10688), (2672, 7856), (3928, 5344)]