645668

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:203

約数の個数: 24

約数和(自身を含む): 1204224

約数和(自身を除く): 558556

約数列:

[1, 2, 4, 31, 41, 62, 82, 124, 127, 164, 254, 508, 1271, 2542, 3937, 5084, 5207, 7874, 10414, 15748, 20828, 161417, 322834, 645668]

約数ペア:

[(1, 645668), (2, 322834), (4, 161417), (31, 20828), (41, 15748), (62, 10414), (82, 7874), (124, 5207), (127, 5084), (164, 3937), (254, 2542), (508, 1271)]