20878508

素因数分解:

$2^2\times 7^2\times {\mathrm{37}}^1\times {\mathrm{2879}}^1$

素因数の和:2934

約数の個数: 36

約数和(自身を含む): 43666560

約数和(自身を除く): 22788052

約数列:

[1, 2, 4, 7, 14, 28, 37, 49, 74, 98, 148, 196, 259, 518, 1036, 1813, 2879, 3626, 5758, 7252, 11516, 20153, 40306, 80612, 106523, 141071, 213046, 282142, 426092, 564284, 745661, 1491322, 2982644, 5219627, 10439254, 20878508]

約数ペア:

[(1, 20878508), (2, 10439254), (4, 5219627), (7, 2982644), (14, 1491322), (28, 745661), (37, 564284), (49, 426092), (74, 282142), (98, 213046), (148, 141071), (196, 106523), (259, 80612), (518, 40306), (1036, 20153), (1813, 11516), (2879, 7252), (3626, 5758)]