261157288

素因数分解:

$2^3\times 7^1\times {\mathrm{53}}^1\times {\mathrm{87991}}^1$

素因数の和:88057

約数の個数: 32

約数和(自身を含む): 570188160

約数和(自身を除く): 309030872

約数列:

[1, 2, 4, 7, 8, 14, 28, 53, 56, 106, 212, 371, 424, 742, 1484, 2968, 87991, 175982, 351964, 615937, 703928, 1231874, 2463748, 4663523, 4927496, 9327046, 18654092, 32644661, 37308184, 65289322, 130578644, 261157288]

約数ペア:

[(1, 261157288), (2, 130578644), (4, 65289322), (7, 37308184), (8, 32644661), (14, 18654092), (28, 9327046), (53, 4927496), (56, 4663523), (106, 2463748), (212, 1231874), (371, 703928), (424, 615937), (742, 351964), (1484, 175982), (2968, 87991)]