20485984

素因数分解:

$2^5\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{257}}^1$

素因数の和:367

約数の個数: 48

約数和(自身を含む): 42130368

約数和(自身を除く): 21644384

約数列:

[1, 2, 4, 8, 16, 32, 47, 53, 94, 106, 188, 212, 257, 376, 424, 514, 752, 848, 1028, 1504, 1696, 2056, 2491, 4112, 4982, 8224, 9964, 12079, 13621, 19928, 24158, 27242, 39856, 48316, 54484, 79712, 96632, 108968, 193264, 217936, 386528, 435872, 640187, 1280374, 2560748, 5121496, 10242992, 20485984]

約数ペア:

[(1, 20485984), (2, 10242992), (4, 5121496), (8, 2560748), (16, 1280374), (32, 640187), (47, 435872), (53, 386528), (94, 217936), (106, 193264), (188, 108968), (212, 96632), (257, 79712), (376, 54484), (424, 48316), (514, 39856), (752, 27242), (848, 24158), (1028, 19928), (1504, 13621), (1696, 12079), (2056, 9964), (2491, 8224), (4112, 4982)]