21005384

素因数分解:

$2^3\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{463}}^1$

素因数の和:629

約数の個数: 32

約数和(自身を含む): 40590720

約数和(自身を除く): 19585336

約数列:

[1, 2, 4, 8, 53, 106, 107, 212, 214, 424, 428, 463, 856, 926, 1852, 3704, 5671, 11342, 22684, 24539, 45368, 49078, 49541, 98156, 99082, 196312, 198164, 396328, 2625673, 5251346, 10502692, 21005384]

約数ペア:

[(1, 21005384), (2, 10502692), (4, 5251346), (8, 2625673), (53, 396328), (106, 198164), (107, 196312), (212, 99082), (214, 98156), (424, 49541), (428, 49078), (463, 45368), (856, 24539), (926, 22684), (1852, 11342), (3704, 5671)]