81408040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{12641}}^1$

素因数の和:12682

約数の個数: 64

約数和(自身を含む): 218453760

約数和(自身を除く): 137045720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3220, 6440, 12641, 25282, 50564, 63205, 88487, 101128, 126410, 176974, 252820, 290743, 353948, 442435, 505640, 581486, 707896, 884870, 1162972, 1453715, 1769740, 2035201, 2325944, 2907430, 3539480, 4070402, 5814860, 8140804, 10176005, 11629720, 16281608, 20352010, 40704020, 81408040]

約数ペア:

[(1, 81408040), (2, 40704020), (4, 20352010), (5, 16281608), (7, 11629720), (8, 10176005), (10, 8140804), (14, 5814860), (20, 4070402), (23, 3539480), (28, 2907430), (35, 2325944), (40, 2035201), (46, 1769740), (56, 1453715), (70, 1162972), (92, 884870), (115, 707896), (140, 581486), (161, 505640), (184, 442435), (230, 353948), (280, 290743), (322, 252820), (460, 176974), (644, 126410), (805, 101128), (920, 88487), (1288, 63205), (1610, 50564), (3220, 25282), (6440, 12641)]