20689420

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{1097}}^1$

素因数の和:1170

約数の個数: 48

約数和(自身を含む): 46484928

約数和(自身を除く): 25795508

約数列:

[1, 2, 4, 5, 10, 20, 23, 41, 46, 82, 92, 115, 164, 205, 230, 410, 460, 820, 943, 1097, 1886, 2194, 3772, 4388, 4715, 5485, 9430, 10970, 18860, 21940, 25231, 44977, 50462, 89954, 100924, 126155, 179908, 224885, 252310, 449770, 504620, 899540, 1034471, 2068942, 4137884, 5172355, 10344710, 20689420]

約数ペア:

[(1, 20689420), (2, 10344710), (4, 5172355), (5, 4137884), (10, 2068942), (20, 1034471), (23, 899540), (41, 504620), (46, 449770), (82, 252310), (92, 224885), (115, 179908), (164, 126155), (205, 100924), (230, 89954), (410, 50462), (460, 44977), (820, 25231), (943, 21940), (1097, 18860), (1886, 10970), (2194, 9430), (3772, 5485), (4388, 4715)]