19987712

素因数分解:

$2^8\times {\mathrm{163}}^1\times {\mathrm{479}}^1$

素因数の和:658

約数の個数: 36

約数和(自身を含む): 40225920

約数和(自身を除く): 20238208

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 163, 256, 326, 479, 652, 958, 1304, 1916, 2608, 3832, 5216, 7664, 10432, 15328, 20864, 30656, 41728, 61312, 78077, 122624, 156154, 312308, 624616, 1249232, 2498464, 4996928, 9993856, 19987712]

約数ペア:

[(1, 19987712), (2, 9993856), (4, 4996928), (8, 2498464), (16, 1249232), (32, 624616), (64, 312308), (128, 156154), (163, 122624), (256, 78077), (326, 61312), (479, 41728), (652, 30656), (958, 20864), (1304, 15328), (1916, 10432), (2608, 7664), (3832, 5216)]