20764960

素因数分解:

$2^5\times 5^1\times {\mathrm{233}}^1\times {\mathrm{557}}^1$

素因数の和:805

約数の個数: 48

約数和(自身を含む): 49356216

約数和(自身を除く): 28591256

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 233, 466, 557, 932, 1114, 1165, 1864, 2228, 2330, 2785, 3728, 4456, 4660, 5570, 7456, 8912, 9320, 11140, 17824, 18640, 22280, 37280, 44560, 89120, 129781, 259562, 519124, 648905, 1038248, 1297810, 2076496, 2595620, 4152992, 5191240, 10382480, 20764960]

約数ペア:

[(1, 20764960), (2, 10382480), (4, 5191240), (5, 4152992), (8, 2595620), (10, 2076496), (16, 1297810), (20, 1038248), (32, 648905), (40, 519124), (80, 259562), (160, 129781), (233, 89120), (466, 44560), (557, 37280), (932, 22280), (1114, 18640), (1165, 17824), (1864, 11140), (2228, 9320), (2330, 8912), (2785, 7456), (3728, 5570), (4456, 4660)]