20991528

素因数分解:

$2^3\times 3^3\times {\mathrm{157}}^1\times {\mathrm{619}}^1$

素因数の和:791

約数の個数: 64

約数和(自身を含む): 58776000

約数和(自身を除く): 37784472

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 108, 157, 216, 314, 471, 619, 628, 942, 1238, 1256, 1413, 1857, 1884, 2476, 2826, 3714, 3768, 4239, 4952, 5571, 5652, 7428, 8478, 11142, 11304, 14856, 16713, 16956, 22284, 33426, 33912, 44568, 66852, 97183, 133704, 194366, 291549, 388732, 583098, 777464, 874647, 1166196, 1749294, 2332392, 2623941, 3498588, 5247882, 6997176, 10495764, 20991528]

約数ペア:

[(1, 20991528), (2, 10495764), (3, 6997176), (4, 5247882), (6, 3498588), (8, 2623941), (9, 2332392), (12, 1749294), (18, 1166196), (24, 874647), (27, 777464), (36, 583098), (54, 388732), (72, 291549), (108, 194366), (157, 133704), (216, 97183), (314, 66852), (471, 44568), (619, 33912), (628, 33426), (942, 22284), (1238, 16956), (1256, 16713), (1413, 14856), (1857, 11304), (1884, 11142), (2476, 8478), (2826, 7428), (3714, 5652), (3768, 5571), (4239, 4952)]