20109728

素因数分解:

$2^5\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{307}}^1$

素因数の和:429

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 21802912

約数列:

[1, 2, 4, 8, 16, 23, 32, 46, 89, 92, 178, 184, 307, 356, 368, 614, 712, 736, 1228, 1424, 2047, 2456, 2848, 4094, 4912, 7061, 8188, 9824, 14122, 16376, 27323, 28244, 32752, 54646, 56488, 65504, 109292, 112976, 218584, 225952, 437168, 628429, 874336, 1256858, 2513716, 5027432, 10054864, 20109728]

約数ペア:

[(1, 20109728), (2, 10054864), (4, 5027432), (8, 2513716), (16, 1256858), (23, 874336), (32, 628429), (46, 437168), (89, 225952), (92, 218584), (178, 112976), (184, 109292), (307, 65504), (356, 56488), (368, 54646), (614, 32752), (712, 28244), (736, 27323), (1228, 16376), (1424, 14122), (2047, 9824), (2456, 8188), (2848, 7061), (4094, 4912)]