21230955

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 39064896

約数和(自身を除く): 17833941

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 73, 115, 207, 219, 281, 345, 365, 657, 843, 1035, 1095, 1405, 1679, 2529, 3285, 4215, 5037, 6463, 8395, 12645, 15111, 19389, 20513, 25185, 32315, 58167, 61539, 75555, 96945, 102565, 184617, 290835, 307695, 471799, 923085, 1415397, 2358995, 4246191, 7076985, 21230955]

約数ペア:

[(1, 21230955), (3, 7076985), (5, 4246191), (9, 2358995), (15, 1415397), (23, 923085), (45, 471799), (69, 307695), (73, 290835), (115, 184617), (207, 102565), (219, 96945), (281, 75555), (345, 61539), (365, 58167), (657, 32315), (843, 25185), (1035, 20513), (1095, 19389), (1405, 15111), (1679, 12645), (2529, 8395), (3285, 6463), (4215, 5037)]