81691840

素因数分解:

$2^6\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8803}}^1$

素因数の和:8849

約数の個数: 56

約数和(自身を含む): 201259440

約数和(自身を除く): 119567600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 145, 160, 232, 290, 320, 464, 580, 928, 1160, 1856, 2320, 4640, 8803, 9280, 17606, 35212, 44015, 70424, 88030, 140848, 176060, 255287, 281696, 352120, 510574, 563392, 704240, 1021148, 1276435, 1408480, 2042296, 2552870, 2816960, 4084592, 5105740, 8169184, 10211480, 16338368, 20422960, 40845920, 81691840]

約数ペア:

[(1, 81691840), (2, 40845920), (4, 20422960), (5, 16338368), (8, 10211480), (10, 8169184), (16, 5105740), (20, 4084592), (29, 2816960), (32, 2552870), (40, 2042296), (58, 1408480), (64, 1276435), (80, 1021148), (116, 704240), (145, 563392), (160, 510574), (232, 352120), (290, 281696), (320, 255287), (464, 176060), (580, 140848), (928, 88030), (1160, 70424), (1856, 44015), (2320, 35212), (4640, 17606), (8803, 9280)]