28091205

素因数分解:

$3^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{499}}^1$

素因数の和:655

約数の個数: 40

約数和(自身を含む): 50820000

約数和(自身を除く): 22728795

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 139, 405, 417, 499, 695, 1251, 1497, 2085, 2495, 3753, 4491, 6255, 7485, 11259, 13473, 18765, 22455, 40419, 56295, 67365, 69361, 202095, 208083, 346805, 624249, 1040415, 1872747, 3121245, 5618241, 9363735, 28091205]

約数ペア:

[(1, 28091205), (3, 9363735), (5, 5618241), (9, 3121245), (15, 1872747), (27, 1040415), (45, 624249), (81, 346805), (135, 208083), (139, 202095), (405, 69361), (417, 67365), (499, 56295), (695, 40419), (1251, 22455), (1497, 18765), (2085, 13473), (2495, 11259), (3753, 7485), (4491, 6255)]