81384660

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{64591}}^1$

素因数の和:64613

約数の個数: 72

約数和(自身を含む): 282137856

約数和(自身を除く): 200753196

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 64591, 129182, 193773, 258364, 322955, 387546, 452137, 581319, 645910, 775092, 904274, 968865, 1162638, 1291820, 1356411, 1808548, 1937730, 2260685, 2325276, 2712822, 2906595, 3875460, 4069233, 4521370, 5425644, 5813190, 6782055, 8138466, 9042740, 11626380, 13564110, 16276932, 20346165, 27128220, 40692330, 81384660]

約数ペア:

[(1, 81384660), (2, 40692330), (3, 27128220), (4, 20346165), (5, 16276932), (6, 13564110), (7, 11626380), (9, 9042740), (10, 8138466), (12, 6782055), (14, 5813190), (15, 5425644), (18, 4521370), (20, 4069233), (21, 3875460), (28, 2906595), (30, 2712822), (35, 2325276), (36, 2260685), (42, 1937730), (45, 1808548), (60, 1356411), (63, 1291820), (70, 1162638), (84, 968865), (90, 904274), (105, 775092), (126, 645910), (140, 581319), (180, 452137), (210, 387546), (252, 322955), (315, 258364), (420, 193773), (630, 129182), (1260, 64591)]