21022816

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{487}}^1$

素因数の和:587

約数の個数: 48

約数和(自身を含む): 44271360

約数和(自身を除く): 23248544

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 71, 76, 142, 152, 284, 304, 487, 568, 608, 974, 1136, 1349, 1948, 2272, 2698, 3896, 5396, 7792, 9253, 10792, 15584, 18506, 21584, 34577, 37012, 43168, 69154, 74024, 138308, 148048, 276616, 296096, 553232, 656963, 1106464, 1313926, 2627852, 5255704, 10511408, 21022816]

約数ペア:

[(1, 21022816), (2, 10511408), (4, 5255704), (8, 2627852), (16, 1313926), (19, 1106464), (32, 656963), (38, 553232), (71, 296096), (76, 276616), (142, 148048), (152, 138308), (284, 74024), (304, 69154), (487, 43168), (568, 37012), (608, 34577), (974, 21584), (1136, 18506), (1349, 15584), (1948, 10792), (2272, 9253), (2698, 7792), (3896, 5396)]