21280384

素因数分解:

$2^7\times {\mathrm{31}}^2\times {\mathrm{173}}^1$

素因数の和:249

約数の個数: 48

約数和(自身を含む): 44059410

約数和(自身を除く): 22779026

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 173, 248, 346, 496, 692, 961, 992, 1384, 1922, 1984, 2768, 3844, 3968, 5363, 5536, 7688, 10726, 11072, 15376, 21452, 22144, 30752, 42904, 61504, 85808, 123008, 166253, 171616, 332506, 343232, 665012, 686464, 1330024, 2660048, 5320096, 10640192, 21280384]

約数ペア:

[(1, 21280384), (2, 10640192), (4, 5320096), (8, 2660048), (16, 1330024), (31, 686464), (32, 665012), (62, 343232), (64, 332506), (124, 171616), (128, 166253), (173, 123008), (248, 85808), (346, 61504), (496, 42904), (692, 30752), (961, 22144), (992, 21452), (1384, 15376), (1922, 11072), (1984, 10726), (2768, 7688), (3844, 5536), (3968, 5363)]