18670840

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{8807}}^1$

素因数の和:8871

約数の個数: 32

約数和(自身を含む): 42806880

約数和(自身を除く): 24136040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 8807, 17614, 35228, 44035, 70456, 88070, 176140, 352280, 466771, 933542, 1867084, 2333855, 3734168, 4667710, 9335420, 18670840]

約数ペア:

[(1, 18670840), (2, 9335420), (4, 4667710), (5, 3734168), (8, 2333855), (10, 1867084), (20, 933542), (40, 466771), (53, 352280), (106, 176140), (212, 88070), (265, 70456), (424, 44035), (530, 35228), (1060, 17614), (2120, 8807)]