21572859

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{1987}}^1$

素因数の和:2055

約数の個数: 32

約数和(自身を含む): 36642816

約数和(自身を除く): 15069957

約数列:

[1, 3, 7, 11, 21, 33, 47, 77, 141, 231, 329, 517, 987, 1551, 1987, 3619, 5961, 10857, 13909, 21857, 41727, 65571, 93389, 152999, 280167, 458997, 653723, 1027279, 1961169, 3081837, 7190953, 21572859]

約数ペア:

[(1, 21572859), (3, 7190953), (7, 3081837), (11, 1961169), (21, 1027279), (33, 653723), (47, 458997), (77, 280167), (141, 152999), (231, 93389), (329, 65571), (517, 41727), (987, 21857), (1551, 13909), (1987, 10857), (3619, 5961)]