81147780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{64403}}^1$

素因数の和:64425

約数の個数: 72

約数和(自身を含む): 281316672

約数和(自身を除く): 200168892

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, 64403, 128806, 193209, 257612, 322015, 386418, 450821, 579627, 644030, 772836, 901642, 966045, 1159254, 1288060, 1352463, 1803284, 1932090, 2254105, 2318508, 2704926, 2898135, 3864180, 4057389, 4508210, 5409852, 5796270, 6762315, 8114778, 9016420, 11592540, 13524630, 16229556, 20286945, 27049260, 40573890, 81147780]

約数ペア:

[(1, 81147780), (2, 40573890), (3, 27049260), (4, 20286945), (5, 16229556), (6, 13524630), (7, 11592540), (9, 9016420), (10, 8114778), (12, 6762315), (14, 5796270), (15, 5409852), (18, 4508210), (20, 4057389), (21, 3864180), (28, 2898135), (30, 2704926), (35, 2318508), (36, 2254105), (42, 1932090), (45, 1803284), (60, 1352463), (63, 1288060), (70, 1159254), (84, 966045), (90, 901642), (105, 772836), (126, 644030), (140, 579627), (180, 450821), (210, 386418), (252, 322015), (315, 257612), (420, 193209), (630, 128806), (1260, 64403)]