21252770

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{3943}}^1$

素因数の和:3975

約数の個数: 48

約数和(自身を含む): 48558528

約数和(自身を除く): 27305758

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 49, 55, 70, 77, 98, 110, 154, 245, 385, 490, 539, 770, 1078, 2695, 3943, 5390, 7886, 19715, 27601, 39430, 43373, 55202, 86746, 138005, 193207, 216865, 276010, 303611, 386414, 433730, 607222, 966035, 1518055, 1932070, 2125277, 3036110, 4250554, 10626385, 21252770]

約数ペア:

[(1, 21252770), (2, 10626385), (5, 4250554), (7, 3036110), (10, 2125277), (11, 1932070), (14, 1518055), (22, 966035), (35, 607222), (49, 433730), (55, 386414), (70, 303611), (77, 276010), (98, 216865), (110, 193207), (154, 138005), (245, 86746), (385, 55202), (490, 43373), (539, 39430), (770, 27601), (1078, 19715), (2695, 7886), (3943, 5390)]