21504

素因数分解:

$2^{10}\times 3^1\times 7^1$

素因数の和:30

約数の個数: 44

約数和(自身を含む): 65504

約数和(自身を除く): 44000

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 56, 64, 84, 96, 112, 128, 168, 192, 224, 256, 336, 384, 448, 512, 672, 768, 896, 1024, 1344, 1536, 1792, 2688, 3072, 3584, 5376, 7168, 10752, 21504]

約数ペア:

[(1, 21504), (2, 10752), (3, 7168), (4, 5376), (6, 3584), (7, 3072), (8, 2688), (12, 1792), (14, 1536), (16, 1344), (21, 1024), (24, 896), (28, 768), (32, 672), (42, 512), (48, 448), (56, 384), (64, 336), (84, 256), (96, 224), (112, 192), (128, 168)]