21440360

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{28211}}^1$

素因数の和:28241

約数の個数: 32

約数和(自身を含む): 50781600

約数和(自身を除く): 29341240

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 28211, 56422, 112844, 141055, 225688, 282110, 536009, 564220, 1072018, 1128440, 2144036, 2680045, 4288072, 5360090, 10720180, 21440360]

約数ペア:

[(1, 21440360), (2, 10720180), (4, 5360090), (5, 4288072), (8, 2680045), (10, 2144036), (19, 1128440), (20, 1072018), (38, 564220), (40, 536009), (76, 282110), (95, 225688), (152, 141055), (190, 112844), (380, 56422), (760, 28211)]