81216940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{12343}}^1$

素因数の和:12406

約数の個数: 48

約数和(自身を含む): 199084032

約数和(自身を除く): 117867092

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 70, 94, 140, 188, 235, 329, 470, 658, 940, 1316, 1645, 3290, 6580, 12343, 24686, 49372, 61715, 86401, 123430, 172802, 246860, 345604, 432005, 580121, 864010, 1160242, 1728020, 2320484, 2900605, 4060847, 5801210, 8121694, 11602420, 16243388, 20304235, 40608470, 81216940]

約数ペア:

[(1, 81216940), (2, 40608470), (4, 20304235), (5, 16243388), (7, 11602420), (10, 8121694), (14, 5801210), (20, 4060847), (28, 2900605), (35, 2320484), (47, 1728020), (70, 1160242), (94, 864010), (140, 580121), (188, 432005), (235, 345604), (329, 246860), (470, 172802), (658, 123430), (940, 86401), (1316, 61715), (1645, 49372), (3290, 24686), (6580, 12343)]