20850640

素因数分解:

$2^4\times 5^1\times {\mathrm{263}}^1\times {\mathrm{991}}^1$

素因数の和:1267

約数の個数: 40

約数和(自身を含む): 48711168

約数和(自身を除く): 27860528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263, 526, 991, 1052, 1315, 1982, 2104, 2630, 3964, 4208, 4955, 5260, 7928, 9910, 10520, 15856, 19820, 21040, 39640, 79280, 260633, 521266, 1042532, 1303165, 2085064, 2606330, 4170128, 5212660, 10425320, 20850640]

約数ペア:

[(1, 20850640), (2, 10425320), (4, 5212660), (5, 4170128), (8, 2606330), (10, 2085064), (16, 1303165), (20, 1042532), (40, 521266), (80, 260633), (263, 79280), (526, 39640), (991, 21040), (1052, 19820), (1315, 15856), (1982, 10520), (2104, 9910), (2630, 7928), (3964, 5260), (4208, 4955)]