18458840

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{8707}}^1$

素因数の和:8771

約数の個数: 32

約数和(自身を含む): 42320880

約数和(自身を除く): 23862040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 8707, 17414, 34828, 43535, 69656, 87070, 174140, 348280, 461471, 922942, 1845884, 2307355, 3691768, 4614710, 9229420, 18458840]

約数ペア:

[(1, 18458840), (2, 9229420), (4, 4614710), (5, 3691768), (8, 2307355), (10, 1845884), (20, 922942), (40, 461471), (53, 348280), (106, 174140), (212, 87070), (265, 69656), (424, 43535), (530, 34828), (1060, 17414), (2120, 8707)]