20770840

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{211}}^1$

素因数の和:352

約数の個数: 64

約数和(自身を含む): 49455360

約数和(自身を除く): 28684520

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 107, 115, 184, 211, 214, 230, 422, 428, 460, 535, 844, 856, 920, 1055, 1070, 1688, 2110, 2140, 2461, 4220, 4280, 4853, 4922, 8440, 9706, 9844, 12305, 19412, 19688, 22577, 24265, 24610, 38824, 45154, 48530, 49220, 90308, 97060, 98440, 112885, 180616, 194120, 225770, 451540, 519271, 903080, 1038542, 2077084, 2596355, 4154168, 5192710, 10385420, 20770840]

約数ペア:

[(1, 20770840), (2, 10385420), (4, 5192710), (5, 4154168), (8, 2596355), (10, 2077084), (20, 1038542), (23, 903080), (40, 519271), (46, 451540), (92, 225770), (107, 194120), (115, 180616), (184, 112885), (211, 98440), (214, 97060), (230, 90308), (422, 49220), (428, 48530), (460, 45154), (535, 38824), (844, 24610), (856, 24265), (920, 22577), (1055, 19688), (1070, 19412), (1688, 12305), (2110, 9844), (2140, 9706), (2461, 8440), (4220, 4922), (4280, 4853)]