21055120

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{11443}}^1$

素因数の和:11479

約数の個数: 40

約数和(自身を含む): 51086016

約数和(自身を除く): 30030896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 11443, 22886, 45772, 57215, 91544, 114430, 183088, 228860, 263189, 457720, 526378, 915440, 1052756, 1315945, 2105512, 2631890, 4211024, 5263780, 10527560, 21055120]

約数ペア:

[(1, 21055120), (2, 10527560), (4, 5263780), (5, 4211024), (8, 2631890), (10, 2105512), (16, 1315945), (20, 1052756), (23, 915440), (40, 526378), (46, 457720), (80, 263189), (92, 228860), (115, 183088), (184, 114430), (230, 91544), (368, 57215), (460, 45772), (920, 22886), (1840, 11443)]