20399360

素因数分解:

$2^8\times 5^1\times {\mathrm{15937}}^1$

素因数の和:15958

約数の個数: 36

約数和(自身を含む): 48865908

約数和(自身を除く): 28466548

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15937, 31874, 63748, 79685, 127496, 159370, 254992, 318740, 509984, 637480, 1019968, 1274960, 2039936, 2549920, 4079872, 5099840, 10199680, 20399360]

約数ペア:

[(1, 20399360), (2, 10199680), (4, 5099840), (5, 4079872), (8, 2549920), (10, 2039936), (16, 1274960), (20, 1019968), (32, 637480), (40, 509984), (64, 318740), (80, 254992), (128, 159370), (160, 127496), (256, 79685), (320, 63748), (640, 31874), (1280, 15937)]