81695740

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{11909}}^1$

素因数の和:11939

約数の個数: 48

約数和(自身を含む): 200088000

約数和(自身を除く): 118392260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 3430, 6860, 11909, 23818, 47636, 59545, 83363, 119090, 166726, 238180, 333452, 416815, 583541, 833630, 1167082, 1667260, 2334164, 2917705, 4084787, 5835410, 8169574, 11670820, 16339148, 20423935, 40847870, 81695740]

約数ペア:

[(1, 81695740), (2, 40847870), (4, 20423935), (5, 16339148), (7, 11670820), (10, 8169574), (14, 5835410), (20, 4084787), (28, 2917705), (35, 2334164), (49, 1667260), (70, 1167082), (98, 833630), (140, 583541), (196, 416815), (245, 333452), (343, 238180), (490, 166726), (686, 119090), (980, 83363), (1372, 59545), (1715, 47636), (3430, 23818), (6860, 11909)]