21385984

素因数分解:

$2^8\times {\mathrm{139}}^1\times {\mathrm{601}}^1$

素因数の和:756

約数の個数: 36

約数和(自身を含む): 43067080

約数和(自身を除く): 21681096

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 139, 256, 278, 556, 601, 1112, 1202, 2224, 2404, 4448, 4808, 8896, 9616, 17792, 19232, 35584, 38464, 76928, 83539, 153856, 167078, 334156, 668312, 1336624, 2673248, 5346496, 10692992, 21385984]

約数ペア:

[(1, 21385984), (2, 10692992), (4, 5346496), (8, 2673248), (16, 1336624), (32, 668312), (64, 334156), (128, 167078), (139, 153856), (256, 83539), (278, 76928), (556, 38464), (601, 35584), (1112, 19232), (1202, 17792), (2224, 9616), (2404, 8896), (4448, 4808)]