81747540

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{64879}}^1$

素因数の和:64901

約数の個数: 72

約数和(自身を含む): 283395840

約数和(自身を除く): 201648300

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, 64879, 129758, 194637, 259516, 324395, 389274, 454153, 583911, 648790, 778548, 908306, 973185, 1167822, 1297580, 1362459, 1816612, 1946370, 2270765, 2335644, 2724918, 2919555, 3892740, 4087377, 4541530, 5449836, 5839110, 6812295, 8174754, 9083060, 11678220, 13624590, 16349508, 20436885, 27249180, 40873770, 81747540]

約数ペア:

[(1, 81747540), (2, 40873770), (3, 27249180), (4, 20436885), (5, 16349508), (6, 13624590), (7, 11678220), (9, 9083060), (10, 8174754), (12, 6812295), (14, 5839110), (15, 5449836), (18, 4541530), (20, 4087377), (21, 3892740), (28, 2919555), (30, 2724918), (35, 2335644), (36, 2270765), (42, 1946370), (45, 1816612), (60, 1362459), (63, 1297580), (70, 1167822), (84, 973185), (90, 908306), (105, 778548), (126, 648790), (140, 583911), (180, 454153), (210, 389274), (252, 324395), (315, 259516), (420, 194637), (630, 129758), (1260, 64879)]